他擅长于打篮球 He specializes in playing basketball
他擅长打篮球
He is good at playing basketball
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他擅长打篮球。
He is good at playing basketball.
youdao
他也擅长打篮球。
He is also good at playing basketball.
他不擅长打篮球，但他喜欢看篮球比赛。
He isn't good at playing basketball, but he likes watching basketball matches.
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