为什么那位演讲者要选择这种两栖动物作为公众生物的代表呢？
Why does the speaker choose that amphibian as her representative of a public creature?
一些两栖动物通过在地下深处的休眠期内完成加速发育以适应干旱环境。
Some amphibians adapt to arid environments by completing accelerated development with resting stages deep underground.
一个类似的策略——加速发展与休息阶段相结合——也使两栖动物得以栖息在沙漠中。
A similar strategy—accelerated development combined with a resting stage—has also allowed amphibians to inhabit deserts.
可以肯定的是，这些水陆两栖物种的数据出现在接近三角坐标中间的位置，位于水栖海龟和陆栖乌龟的坐标点之间。
Sure enough, these amphibious species show up on the triangular graph approximately half way between the "wet cluster" of sea turtles and the "dry cluster" of land tortoises.
北美两栖类监测计划是美国最大的青蛙计数系统。
The North American Amphibian Monitoring Program is the country's largest frog-counting system.
蟾蜍和青蛙都是两栖动物。
北美两栖动物监测中心是美国最大的青蛙统计机构。
The North American Amphibian Monitoring Program is the country’s largest frog-counting system.
北美两栖动物监测中心是美国最大的青蛙统计机构。
The North American Amphibian Monitoring Program is the country's largest frog-counting system.
在超过两百年的两栖动物研究历史中，这从未被报告过。
In more than 200 years of [amphibian research] this has never been reported.
起初，天气乍凉的时候，这种两栖动物将自己埋在土壤里。
At first this amphibian deals with the cooler days by burying itself in the soil.
世界上有六千种两栖动物，其中多达一半的两栖动物濒临灭绝。
Up to half of the world's 6, 000 amphibian species are thought to be in danger of extinction.
把摩托车改成水陆两栖车驶进下龙湾，对度假者来说是有点过分了。
Converting the bikes to amphibious vehicles to explore Halong Bay might be a step too far for a holiday.
鸟类和哺乳类靠质生存,而非以量取胜，这与鱼类和两栖类不同。
Birds and mammals invest in quality and not quantity, as opposed to fish and reptiles.
登陆：两栖大巴刚刚进行了一次成功的试航，它正缓缓地驶出克莱德河。
Land ahoy: the amphibious bus emerges from the River Clyde after a successful test run.
不过直到现在，研究者才认识到两栖动物的幼仔可能也会在水下发出声音。
Until now though, researchers did not realise that amphibian larva might also produce sounds underwater.
早期的陆地脊椎动物、早期的两栖动物，还有鳄鱼和恐龙的近亲也是如此。
This is also the same game that early land vertebrates, early amphibians and early relatives of crocs and dinosaurs were playing.
这些危险组包括1/8鸟类，1/5哺乳类，1/4珊瑚和1/3两栖类。
That troubled group included one in eight of the bird species, one in five mammals, one in four corals and one in three amphibians.
它们古老的两栖特征可能是理解恐龙时代的繁荣及它们最终幸存下来的关键。
Their amphibious talents in the past may be the key to understanding how they flourished in, and ultimately survived, the dinosaur era.
如某些两栖动物即使在完全成熟并已经度过水中生活的时期后仍然保留有鳃。
For example, certain amphibians retain fishlike gills even when fully mature and past their water-inhabiting period.
鱼类首先出现在4亿5000万年前，两栖动物出现在大约3亿8000万年前。
Fish are first found about 450 million years ago, while amphibians appear roughly 380 million years ago.
所以爬行动物和两栖动物会感染上数以万计的真菌，而我们只会被几百种真菌侵害。
So tens of thousands of fungi can infect reptiles and amphibians, but we can only be invaded by a few hundred fungi.
在德国莱比锡动物园的帮助下，该大学正在主持一个圈养繁殖两栖动物的研究项目。
The university, with the help of Germany's Leipzig zoo, is leading a project to breed amphibians in captivity.
五角大楼的F-35隐形战机和美国海军圣安东尼奥级两栖舰都曾遇到过发动机难题。
Just ask the designers of the Pentagon’s F-35 stealth fighter and the U.S. Navy’s San Antonio-class amphibious ships. Both have been nearly sidelined by engine woes.
容格斯说，真正的问题是为什么我们放弃两栖战略，而选择目前的全时陆地生活。
The real question, Jungers says, is why we abandoned that strategy or chose an alternative strategy — the alternative being full-time living on terra firma.
然而到了1992年在公园中只观察到4种两栖动物，并且每种动物的数量都显著下降。
However, in 1992 there were only four species of amphibians observed in the park, and the Numbers of each species were drastically reduced.
然而到了1992年在公园中只观察到4种两栖动物，并且每种动物的数量都显著下降。
However, in 1992 there were only four species of amphibians observed in the park, and the Numbers of each species were drastically reduced.
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