重点讲解：
1. bend over backwards
竭尽全力；
eg. People are bending over backwards to please customers.
人们正使出浑身解数取悦顾客RrU%4_&tK*Odp*bV)|!。
eg. Sue will bend over backwards to help her friends.
苏会尽全力帮助朋友7m&quja-kn%]PEVSw。
2. go to great lengths
不遗余力；竭尽全力；千方百计；
eg. Greta Garbo went to great lengths to hide from reporters and photographers.
葛丽泰·嘉宝想方设法躲开记者和摄影师3;vQaUElwtie8oB。
eg. He'll go to great lengths to get the job done.
他将不遗余力去完成这项工作P^cZ~x3KpR61pCJrz-,K。
3. put in
花费，投入（时间或精力）；
eg. They've put in time and effort to keep the strike going.
他们花费了很多时间和精力以使罢工持续下去C^3&5g+tR*,D.Xjx。
eg. If we don't put money in we will lose our investment.
如果我们不再投入资金，我们会失掉本金%Wx)XXrm6!h5r&Hd)t。
4. expect sb. to do sth.
要求；认为应当得到；指望某人做某事；
eg. I wasn't expecting you to help.
我没指望你帮忙6nLXaJhanAH4。
eg. It is unrealistic to expect them to be able to solve the problem immediately.
指望他们能够立即解决问题是不现实的jBa;eBjkiAoK。