英语听力：自然百科 北极熊 冰上间谍 Spy_Bear—8

 This new and ever-changing world requires a different spy-camera, iceberg-cam. It effortless steers¹ between ice sheets and its turret² rotates to follow the bears. 

 

The bear's lives are now governed by the state of the drifting ice and the movement of the seals. The cubs³ are expected to keep up, but their mother knows their limits, avoiding long, hazardous⁴ swims. But all awhile, she keeps them on the move, tracking the seals that gather around the leading edge of ice.

 

Back on land, iceberg-cam follows the one-cub family. With the seals gone, beachcombing is her best option to find food. He practices his climbing skills, but it's early days. She's found something just below the surface. She checks how deep she has to dive, then takes the plunge⁵.

1 steers   

n.阉公牛，肉用公牛( steer的名词复数 )v.驾驶( steer的第三人称单数 )；操纵；控制；引导

参考例句：

• This car steers easily. 这部车子易于驾驶。 来自《简明英汉词典》
• Good fodder fleshed the steers up. 优质饲料使菜牛长肉。 来自辞典例句

2 turret   

n.塔楼，角塔

参考例句：

• This ancient turret has attracted many visitors.这座古老的塔楼吸引了很多游客。
• The soldier scaled the wall of the fortress by turret.士兵通过塔楼攀登上了要塞的城墙。

3 cubs   

n.幼小的兽，不懂规矩的年轻人( cub的名词复数 )

参考例句：

• a lioness guarding her cubs 守护幼崽的母狮
• Lion cubs depend on their mother to feed them. 狮子的幼仔依靠母狮喂养。 来自《简明英汉词典》

4 hazardous   

adj.(有)危险的，冒险的；碰运气的

参考例句：

• These conditions are very hazardous for shipping.这些情况对航海非常不利。
• Everybody said that it was a hazardous investment.大家都说那是一次危险的投资。

5 plunge   

v.跳入，(使)投入，(使)陷入；猛冲

参考例句：

• Test pool's water temperature before you plunge in.在你跳入之前你应该测试水温。
• That would plunge them in the broil of the two countries.那将会使他们陷入这两国的争斗之中。