Dramatic social change seldom takes such a benign form.

巨大的社会变革很少能有这样温和的形式。

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A more severe form of B.P.H. is not always benign.

而另外几种形式的B.P.H .就不见得是良性的了。

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Essential tremor, also called benign essential tremor, is the most common form of tremor.

特发性震颤，也被称为良性特发性震颤，是最常见的震颤。

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Essential tremor, also called benign essential tremor, is the most common form of tremor.

特发性震颤，也被称为良性特发性震颤，是最常见的震颤。

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