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试管婴儿的研究是出于帮助不孕夫妇的愿望。
The work on IVF was driven by the desire to help infertile couples.
这份文件通过它的长度成功保卫了自己不被阅读的权利。
最好的发现是那些提出的问题比它们回答的还要多的发现。
The world owes all its onward impulses to men ill at ease. The happy man inevitably confines himself within ancient limits.