第1个回答 2006-12-05
精通be proficient in
熟悉be familiar with
一般common
第2个回答 2006-12-05
精通be master at
熟悉be familiar with
一般know..to some degree
第3个回答 2006-12-05
be master at/masterly
be familiar to/familiarly
commonly本回答被提问者采纳
第4个回答 2006-12-05
professional
know well
know a little
第5个回答 2006-12-05
Proficient Familiar Just so-so