Doing all this is a hard job, which may explain why no scholars have done it.

这是项艰难的工作，因而尚无学者做过这项研究。

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Whenever an airplane crashes, investigators focus on the black-box data, which may explain why the plane went down.

每当飞机失事，调查人员都会将注意力集中在黑匣子数据上，它也许能解释飞机坠毁的原因。

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Which may explain why, for awhile, the Guinness World Records folks ignored tobacco and called tryptophan the king.

这也许解释了为什么吉尼斯世界纪录那么久都忽视了烟草（病毒的单词），却给色氨酸（蛋白的单词）封王。

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Which may explain why the europhiles have picked such apparently unfavourable ground upon which to turn and fight.

BBC: Euro puzzle on investment

The large advertisers stayed more conservative, however, which may explain why the internet-advertising market is still disproportionately small.

ECONOMIST: Internet advertising

Companies in India are more exposed to market forces than in China, which may explain the superior margin results.

FORBES: India Vs. China: J.P. Morgan's Banker To The Rich Picks The Former