VOA标准英语2011--Noisy Ships Have Whales Yelling to be He

Noisy Ships Have Whales Yelling to be Heard

Ferries, freighters and fishing and tour boats are part of the tableau¹ that often makes living by the sea postcard-pretty and desirable. But all that maritime² activity creates cacophony³ underwater - and has conservationists and shippers discussing ways to dial that volume down.
Marine⁴ scientists at the University of Victoria record sounds through an underwater microphone placed near the shipping⁵ lanes off Canada's Vancouver Island. To them, it almost sounds like the whales are shouting to be heard over the nearly continuous engine noise.
Can you hear me now?
Michael Jasny, senior policy analyst⁶ for the Natural Resources Defense⁷ Council, says this "fog of noise," as he calls it, is impeding⁸ the ability of whales to communicate.
"Shipping noise falls across the same frequencies that these animals use for all their vital behaviors - for feeding, for finding mates, for avoiding predators⁹ and for navigating¹⁰."
According to Jasny, sound travels very efficiently¹¹ underwater and he's not only worried about marine mammals. "The entire web of life in the oceans depends on sound."
The science in this arena¹² is pretty new. Precise boundaries between noisy and quiet, safe and harmful have yet to be established. But Jasny believes the risks can only rise as international trade and offshore¹³ drilling increase.
"As the research has been done, it's been very clear that what we have on our hands is really a major problem. It's a serious problem. It's global problem. Fortunately, in shipping, we have a problem that has a solution."
And that solution is quieter ship designs. Nearby in Victoria, Canada, several whale-watch companies brag¹⁴ that their boats produce less underwater racket. Bigger examples are the newest four vessels¹⁵ to join the fleet of the U.S. ocean research agency, NOAA. They're each 63 meters long.
Quieter ships
Michael Bahtiarian, vice¹⁶ president of Noise Control Engineering, consulted on their design. "These NOAA ships show that you can get fairly quiet - I think quiet enough - because they are able at 11 knots to go up and count a fish and not startle the fish so they can actually count it."
Bahtiarian points to propellers¹⁸ as the primary source of noise pollution. The fix is to match a more efficient propeller¹⁷ with an optimized¹⁹ hull²⁰ shape. The new federal research ships also have more expensive engines that reduce vibration²¹.
"People are saying a lot of, ‘Oh boy, here comes something else we have to deal with.' You know, the technology has been around," he says. "It's just technology that we've had in the military realm for a while."
Joint²² effort
Kathy Metcalf, who directs maritime affairs at the Chamber²³ of Shipping of America, says the U.S. shipping industry recognizes the potential noise pollution problem and wants to be part of the solution.
"Our approach is that if we're progressive now and begin the changeover in the design of ships before we are forced to do it, it will be much less costly²⁴ to the industry."
And there's one more big selling point.
"If people see the fuel savings²⁵ that we expect to be obtained from this more refined ship design, we don't think you're going to have to sell the concept to anybody," says Metcalf.
She says the best venue²⁶ for working out any new rules for shipping is a United Nations agency called the International Maritime Organization. She estimates that process could take five years. Eventually, other UN groups may be tapped to control other sources of underwater noise, such as offshore oil and gas production or naval²⁷ exercises.

1 tableau   

n.画面，活人画（舞台上活人扮的静态画面）

参考例句：

• The movie was a tableau of a soldier's life.这部电影的画面生动地描绘了军人的生活。
• History is nothing more than a tableau of crimes and misfortunes.历史不过是由罪恶和灾难构成的静止舞台造型罢了。

2 maritime   

adj.海的，海事的，航海的，近海的，沿海的

参考例句：

• Many maritime people are fishermen.许多居于海滨的人是渔夫。
• The temperature change in winter is less in maritime areas.冬季沿海的温差较小。

3 cacophony   

n.刺耳的声音

参考例句：

• All around was bubbling a cacophony of voices.周围人声嘈杂。
• The drivers behind him honked,and the cacophony grew louder.后面的司机还在按喇叭，且那刺耳的声音越来越大。

4 marine   

adj.海的；海生的；航海的；海事的；n.水兵

参考例句：

• Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
• When the war broke out,he volunteered for the Marine Corps.战争爆发时，他自愿参加了海军陆战队。

5 shipping   

n.船运（发货，运输，乘船）

参考例句：

• We struck a bargain with an American shipping firm.我们和一家美国船运公司谈成了一笔生意。
• There's a shipping charge of ￡5 added to the price.价格之外另加五英镑运输费。

6 analyst   

n.分析家，化验员；心理分析学家

参考例句：

• What can you contribute to the position of a market analyst?你有什么技能可有助于市场分析员的职务？
• The analyst is required to interpolate values between standards.分析人员需要在这些标准中插入一些值。

7 defense   

n.防御，保卫；[pl.]防务工事；辩护，答辩

参考例句：

• The accused has the right to defense.被告人有权获得辩护。
• The war has impacted the area with military and defense workers.战争使那个地区挤满了军队和防御工程人员。

8 impeding   

a.(尤指坏事)即将发生的，临近的

参考例句：

• Fallen rock is impeding the progress of rescue workers. 坠落的石头阻滞了救援人员的救援进程。
• Is there sufficient room for the kiosk and kiosk traffic without impeding other user traffic? 该环境下是否有足够的空间来摆放信息亭？信息亭是否会妨碍交通或者行走？ 来自About Face 3交互设计精髓

9 predators   

n.食肉动物( predator的名词复数 )；奴役他人者（尤指在财务或性关系方面）

参考例句：

• birds and their earthbound predators 鸟和地面上捕食它们的动物
• The eyes of predators are highly sensitive to the slightest movement. 捕食性动物的眼睛能感觉到最细小的动静。 来自《简明英汉词典》

10 navigating   

v.给（船舶、飞机等）引航，导航( navigate的现在分词 )；（从海上、空中等）横越；横渡；飞跃

参考例句：

• These can also be very useful when navigating time-based documents, such as video and audio. 它对于和时间有关的文档非常有用，比如视频和音频文档。 来自About Face 3交互设计精髓
• Vehicles slowed to a crawl on city roads, navigating slushy snow. 汽车在市区路上行驶缓慢，穿越泥泞的雪地。 来自互联网

11 efficiently   

adv.高效率地，有能力地

参考例句：

• The worker oils the machine to operate it more efficiently.工人给机器上油以使机器运转更有效。
• Local authorities have to learn to allocate resources efficiently.地方政府必须学会有效地分配资源。

12 arena   

n.竞技场，运动场所；竞争场所，舞台

参考例句：

• She entered the political arena at the age of 25. 她25岁进入政界。
• He had not an adequate arena for the exercise of his talents.他没有充分发挥其才能的场所。

13 offshore   

adj.海面的，吹向海面的；adv.向海面

参考例句：

• A big program of oil exploration has begun offshore.一个大规模的石油勘探计划正在近海展开。
• A gentle current carried them slowly offshore.和缓的潮流慢慢地把他们带离了海岸。

14 brag   

v./n.吹牛，自夸；adj.第一流的

参考例句：

• He made brag of his skill.他夸耀自己技术高明。
• His wealth is his brag.他夸张他的财富。

15 vessels   

n.血管( vessel的名词复数 )；船；容器；（具有特殊品质或接受特殊品质的）人

参考例句：

• The river is navigable by vessels of up to 90 tons. 90 吨以下的船只可以从这条河通过。 来自《简明英汉词典》
• All modern vessels of any size are fitted with radar installations. 所有现代化船只都有雷达装置。 来自《现代汉英综合大词典》

16 vice   

n.坏事；恶习；[pl.]台钳，老虎钳；adj.副的

参考例句：

• He guarded himself against vice.他避免染上坏习惯。
• They are sunk in the depth of vice.他们堕入了罪恶的深渊。

17 propeller   

n.螺旋桨，推进器

参考例句：

• The propeller started to spin around.螺旋桨开始飞快地旋转起来。
• A rope jammed the boat's propeller.一根绳子卡住了船的螺旋桨。

18 propellers   

n.螺旋桨，推进器( propeller的名词复数 )

参考例句：

• The water was thrashing and churning about under the propellers. 水在螺旋桨下面打旋、翻滚。 来自辞典例句
• The ship's propellers churned the waves to foam. 轮船的推进器将海浪搅出泡沫。 来自辞典例句

19 optimized   

adj.最佳化的，（使）最优化的v.使最优化，使尽可能有效( optimize的过去式和过去分词 )

参考例句：

• We are often asked whether consumer Web sites should be optimized for beginners or intermediates. 我们常常被问到这样的问题：消费类网站究竟应该为新手而优化，还是应该为中间用户而优化？ 来自About Face 3交互设计精髓
• GOOGLE Advertising optimized sequence, greatly increasing the advertising effect. 优化了GOOGLE广告位排列顺序，大大增加了广告效果。 来自互联网

20 hull   

n.船身；(果、实等的)外壳；vt.去(谷物等)壳

参考例句：

• The outer surface of ship's hull is very hard.船体的外表面非常坚硬。
• The boat's hull has been staved in by the tremendous seas.小船壳让巨浪打穿了。

21 vibration   

n.颤动，振动；摆动

参考例句：

• There is so much vibration on a ship that one cannot write.船上的震动大得使人无法书写。
• The vibration of the window woke me up.窗子的震动把我惊醒了。

22 joint   

adj.联合的，共同的；n.关节，接合处；v.连接，贴合

参考例句：

• I had a bad fall,which put my shoulder out of joint.我重重地摔了一跤，肩膀脫臼了。
• We wrote a letter in joint names.我们联名写了封信。

23 chamber   

n.房间，寝室；会议厅；议院；会所

参考例句：

• For many,the dentist's surgery remains a torture chamber.对许多人来说，牙医的治疗室一直是间受刑室。
• The chamber was ablaze with light.会议厅里灯火辉煌。

24 costly   

adj.昂贵的，价值高的，豪华的

参考例句：

• It must be very costly to keep up a house like this.维修这么一幢房子一定很昂贵。
• This dictionary is very useful,only it is a bit costly.这本词典很有用，左不过贵了些。

25 savings   

n.存款，储蓄

参考例句：

• I can't afford the vacation,for it would eat up my savings.我度不起假，那样会把我的积蓄用光的。
• By this time he had used up all his savings.到这时，他的存款已全部用完。

26 venue   

n.犯罪地点，审判地，管辖地，发生地点，集合地点

参考例句：

• The hall provided a venue for weddings and other functions.大厅给婚礼和其他社会活动提供了场所。
• The chosen venue caused great controversy among the people.人们就审判地点的问题产生了极大的争议。

27 naval   

adj.海军的，军舰的，船的

参考例句：

• He took part in a great naval battle.他参加了一次大海战。
• The harbour is an important naval base.该港是一个重要的海军基地。