《整体环境科学》的一篇论文显示，中国最大的淡水鱼可能已经在2005年至2010年间灭绝了。2019年9月，该论文的作者危起伟表示，一些专家认为这种一级保护鱼类已经灭绝。

A paper from Science of the Total Environment shows that the largest freshwater fish in China might have gone extinct between 2005 and 2010. Wei Qiwei, author of the paper, said in September, 2019, some experts supposed that the first-class protected fish had been extinct already.

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他们的地位岌岌可危，所以他们正在进行一些大胆的试验。

But so perilous is their position that some bold experiments are under way.

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即使如此，她也顾虑你走在一条岌岌可危的路上。

But even then, she cautions that you're walking a precarious line.

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