中英释义：
原声例句
他非常擅长于出入各种地方，无声无息，除了留下个死尸以外，不会留下任何蛛丝马迹，他是个合法的英国混蛋。
He's really good at getting in and out of places without being seen and leaving nothing but a body count in his wake. He's a legitimate English badass.
《速度与激情7》《Fast & Furious 7》
双语例句
“我不擅长于…”应该说：
I am not be good at.
擅长于讲笑话
Be good at telling jokes
擅长于（做）某事
Be good at( doing )sth.
他过去擅长于打板球，可现在已荒疏了。
He used to be good at cricket, but now be's out of practice .
他擅长于解决数学问题。
He is good at solving math problems.
我擅长于烹饪。
I am good at cooking.
她擅长于绘画。
She is good at painting.
她擅长于演讲。
She is good at giving speeches.
他们擅长于踢足球。
They are good at playing soccer.
他不擅长于棒球短打.
He is no good at Bunting the Baseball.
重点词汇
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擅长于
be good at; be apt at; be deft at; specialize in