be expert in something
精通某事
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Everyone is, or can be, expert in something.
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When Marshall described great feats like Len Hutton's innings of 364 in 1938, he did so without the support of an expert summariser - something which would be almost unbelievable to today's generation of commentators.
BBC: TMS: A glorious history
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