Machine translation makes some parents raise doubts about the necessity for their children to learn foreign languages.

机器翻译使一些父母怀疑是否有必要让他们的孩子学习外语。

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The effect of this contradiction is to provoke cynicism and raise doubts about Medvedev's sincerity or the extent to which he is actually in charge.

这种矛盾结果引发了人们愤世嫉俗的情绪，人们开始质疑他是否真诚，或者他到底有多大的权力。

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The mistakes we make in telling time also raise doubts about the clock models.

人类在报时上所犯的错误同样也使我们对大脑的计时模式提出了质疑。

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But no politician or bureaucrat seems prepared to raise doubts, if, indeed, any are harbored.

FORBES: Connect

Rankings based on anonymous online votes, such as those on TripAdvisor, also raise doubts.

WSJ: Restaurant Rankings May Give You Little to Chew On

Such largesse sounds wonderful, but a dramatic cancellation of loans could raise doubts about the rural-credit culture.

ECONOMIST: A generous budget, but not a prudent one