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have has 句子中的意思,

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have has 句子中的意思,
In recent years the focus has intensified as scientists have learned more about its importance.
并翻译之.
have has 句子中的意思,
这个句子没有提供上文内容,无法所指的特定事物,只能将句子按字面意思翻译如下:
In recent years the focus has intensified as scientists have learned more about its importance.
近年来,当科学家们已经更了解到关于它的重要性,从而更加强了对它的关注.
▲在这里的 has / have 都是过去完成时,后面都加P.P(过去分词)