an expert in/at/on/with有什么区别?

来源：学生作业帮编辑：大师作文网作业帮分类：英语作业时间：2024/09/21 05:41:56

an expert in/at/on/with有什么区别?
例子：1.an expert in/at teaching small children
意思就是说an expert in和an expert at通用对吗?
2.an expert in economics
3.an expert on foreign affairs
4.an expert with the needles

expert at:擅长=be good at,do well in
expert on:关于...方面的专家
expert in:熟练于...

an expert in/at/on/with有什么区别? an expert in/on/at有什么区别 expert at/on/in 有什么区别 be expert on in at有什么区别 expert用法expert后面带介词in,at,on,有什么区别啊? an expert on和be expert in的区别是be an expert in/at/on ,还是be expert in/at/on? be expert in与be expert at 的区别基本英语语法,请指教in,with,for,at,on,expert,to,against,out,up,around, in,at和on有什么区别? to,in,at,for.with,into,on.这些介词有什么区别 start后可以加at、in、on,with么?有什么区别?