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.

《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。

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Finally the teacher calmly told me this title is the first question before exam, then asked me after class to explain to him why I answer on the paper is accurate.

最后老师平静的告诉我这个题目就是前天考试的第一题，接着要求我在下课后向他解释为什么我试卷上的答案准确无误。

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In this paper, we first introduce a class of mixed variational-like inequalities problems.

本文中，我们首先给出了一类混合似变分不等式问题。

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Mr. Nulty has a collection of more than 400 airplane models plus old ads and posters, TWA first-class menus from 1960s and paper dresses worn by TWA flight attendants.

WSJ: Airline Collectibles Take Flight