他打网球很在行,接发球技术特别娴熟。

He's good at playing tennis, especially with his serve and return skills.

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He's good at playing tennis, especially with his serve and return skills.

good 在这里是形容词,意思是"好的、擅长的"。 be good at 是一个固定搭配,表示"擅长做某事",后面接名词或动名词形式。

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