1.engage in:take part in.这是一个比较正式的用词，同义词有，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.
同义词:mock 搭配:sneer/ mock at
例句:He sneered at people who like pop music.
4.on hand: available,especially to help.现有的帮助
The emergency services were on hand with medical advice.
5.at expense of: with loss or damage to sb.在牺牲或损害……的情况下
He built up his business at expense of his health.
