1. learn . by heart 用心学习，记住2. combine . with . 使.与.结合/联合3. in that circumstances 如果那样的话4. replace . with . 用.代替.5. keep a record of 记录6. comment on . 对 . 发表评论7. at least 至少8. expect of/from. 从.当中期待9. in return 作为回报10. the survey on . 关于. 的调查11. differ in. 在.方面不同12. emerge from. 从.出现13. be satisfied with. 对.满意14. play . roles 扮演.的角色15. lean over. 弯下身子 俯身于.之上16. turn out 结果是，证明是17. in silence 在沉默中18. burst into lau
