be on duty 值班，值日，在上班时
be in duty bound to(do)(=be required by one’s job or esp.by conscience) 有义务(做)
be eager for 想得到，盼望
by ear(=play music from memory without having seen it printed)凭记忆，不看乐谱
have an ear for(=have keen recognition of sounds esp.in music and language)对…鉴赏力
a word in one’s ear 私房话，秘密话
on earth 究竟，到底，全然
with ease(=easily)容易，不费力
at(one’s)ease(=without worry or nervousness)自在，不拘束
put sb. at his her ease(=free sb. from worry or nervousness)使某人感到无拘束
economize on(=save sth. instead of being wasteful)节省
have an effect on 对…有影响
be in effect(=be in operation)有效
go into effect 生效(近 come into effect;take effect;be brought into effect)
in effect(=in fact，really)实际上
give effect to(=carryout)实行，使…生效
to no effect 不起作用，没有取得任何效果
(be)of no effect(=useless)无效
to the effect that 大意是…，主要内容是…
to that effect 是那个意思的…
emerge from(=appear，become known)出现，暴露(问题. 意见等)
place(or put，lay)an emphasis on 强调，把重点放在…上
encourage sb. in 鼓励;encourage sb. in his her work 鼓励某人工作;encourage sb. in his her idleness 怂恿某人游手好闲
encourage sb.in…with sth. 用…鼓励某人做某事
on end(=continuously)连续地
