He has a great number of English idioms at his command.

他掌握了大量的英语成语.

《简明英汉词典》

He has a great number of English idioms at command.

他掌握了大量的英语成语。

辞典例句

There are many English idioms that cannot be rendered into other languages.

有许多英语的惯用语不能译成别国语言.

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I singled out a few English idioms to test my classmates.

我挑出几条英语成语(idiom),考了一下我的同班同学. .

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There are some English idioms that cannot be adequately rendered into other languages.

有些英语成语很难帖切地译成别种语言.

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