擅长的英文是：be good at，be expert in。
be good at的用法
1、You have to be good at spotting trouble on the way and heading it off.
你必须善于发现潜在的麻烦并加以化解。
2、A teacher should be good at drawing inferences about other cases from one instance.
老师要善于举一反三。
3、Viruses tend to be good at surviving when a computer system crashes.
计算机病毒在系统崩溃后往往依然存在。
4、I independence, because I be good at association with person.
我独立，因为我善于与人交往。
5、But if you have a good method of learning, I think you will be good at it.
但是如果你有好的学习方法，我想你就会学会它。
be expert in的用法
1、Travel them, and be expert in home-cosmography.
那末去旅行，成为家庭宇宙志的地理专家。
2、I have never claimed to be an expert in this field.
我从来没有声称是这方面的专家。
3、I hope I will be an expert in this field.
我希望在未来成为这方面的专家。
4、She is supposed to be an expert in this field.
人们认为她在这方面是专家。
5、I don't profess to be an expert in this subject.
我不敢自诩为这方面的专家。
橄榄色的水
