Some 25 percent of all known amphibian species were discovered only over the last ten years, a period when their Numbers worldwide have been in desperate decline.
过去十年科学家发现了25%的两栖动物物种，与此同时，两栖动物数量在世界范围内却急剧下降。
Some 25 percent of all known amphibian species were discovered only over the last ten years, a period when their Numbers worldwide have been in desperate decline.
过去十年科学家发现了25%的两栖动物物种，与此同时，两栖动物数量在世界范围内却急剧下降。
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