1. be on duty值班，值日，在上班时
2. be in duty bound to (do) (=be required by one's job or esp. by conscience)有义务(做)
3. be eager for想得到，盼望
4. by ear (=play music from memory without having seen it printed)凭记忆，不看乐谱
5. have an ear for (=have keen recognition of sounds esp. in music and language)对……有鉴赏力
6. a word in one's ear私房话，秘密话
7. on earth究竟，到底，全然考试资料网(www.ppkao。com)
8. with ease ( = easily)容易，不费力
9. at (one's) ease ( = without worry or nervousness)自在，不拘束
10. put sb. at his / her ease (=free sb. from worry or nervousness)使某人感到无拘束
[b]
发表于 2016-8-9 16:26:47