In humans, if the mother is ailing, the child suffers. We are the cause of the ailing planet and we
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尽管我承认有问题存在,但我并不认为这些问题不能解决。(while)
These problems are too complicated to be explained clearly in a few words.
达尔文坚信进化论(The Theory ofEvolution)的基础是物竞天择。
飞机失事后,幸存者们惟一能做的就只有待在荒岛上等待救援了。