1.engage in:take part in.這是一個比較正式的用詞，同義詞有，participate in,join in

例句 She tried desperately to engage him in conversation

2.deal in :to be interested in or involved in

3.sneer: to show that you have no respect for sb by the expression on your face or by the way you speak.

同義詞:mock? 搭配:sneer/ mock at

例句:He sneered at people who like pop music.

4.on hand: available,especially to help.現(xiàn)有的幫助

The emergency services were on hand with medical advice.

5.at expense of: with loss or damage to sb.在犧牲或損害……的情況下

He built up his business at expense of his health.