SSS 2012-01-16_在线英语听力室_免费在线英语听力学习网站

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Magnifying glass, calipers¹, teeny tiny tape measure, these are the weapons with which researchers are fighting it out to find the world's smallest frog. One team just announced the discovery of the unaverage 7.7 millimeter p* which can sit comfortably on a dime². It was discovered in the moist underlayer of New Guinea's tropical rain forest. The research was published in the Journal Public Library of Science One.

The little guide does oust³ another New Guinea frog which had only claimed the title in December. The newest frog species is also being said as the world's smallest vertebrate. Although it's the more correctly the smallest free living vertebrate, as 6.2 millimeter meal anglerfish spends its life buried in the body of its mate. Finding the little frog was no smaller achievement. Besides being tiny, the high pitch mating calls researchers followed, sound more insect to amphibian⁴. Tiny vertebrates reveal changes that make many * possible.For instance, some of the digits⁵ on the frogs' feet have disappeared, and their skulls⁶ developed differently than those of larger critters. So we celebrate the world's smallest frog and free living vertebrate, until the next one is discovered.

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1 calipers
n.书法，测径器；测径器
参考例句：
He picked up the calipers and gauged carefully.他拿起卡钳仔细测量。 The carpenter gauged the dowel with calipers.那木匠用卡钳估量暗榫。

2 dime
n.（指美国、加拿大的钱币）一角
参考例句：
A dime is a tenth of a dollar.一角银币是十分之一美元。 The liberty torch is on the back of the dime.自由火炬在一角硬币的反面。

3 oust
vt.剥夺，取代，驱逐
参考例句：
The committee wanted to oust him from the union.委员会想把他从工会中驱逐出去。 The leaders have been ousted from power by nationalists.这些领导人被民族主义者赶下了台。

4 amphibian
n.两栖动物；水陆两用飞机和车辆
参考例句：
The frog is an amphibian,which means it can live on land and in water.青蛙属于两栖动物，也就是说它既能生活在陆地上也能生活在水里。 Amphibian is an important specie in ecosystem and has profound meaning in the ecotoxicology evaluation.两栖类是生态系统中的重要物种，并且对环境毒理评价有着深远意义。

5 digits
n.数字( digit的名词复数 )；手指，足趾
参考例句：
The number 1000 contains four digits. 1000是四位数。来自《简明英汉词典》 The number 410 contains three digits. 数字 410 中包括三个数目字。来自《现代英汉综合大词典》

6 skulls
颅骨( skull的名词复数 )；脑袋；脑子；脑瓜
参考例句：
One of the women's skulls found exceeds in capacity that of the average man of today. 现已发现的女性颅骨中，其中有一个的脑容量超过了今天的普通男子。 We could make a whole plain white with skulls in the moonlight! 我们便能令月光下的平原变白，遍布白色的骷髅！