(1)constant:adj. a.happening regularly or all the time经常发生的，不断的 e.g.There was a constant stream of visitors to the house e.g.她的诊室不断有家长前来求助 Her clinic has a constant stream of parents wanting help. b.staying the same不变的，固定的 e.g.The truck was traveling at a fairly constant speed c.loyal and faithful忠实的 e.g.He isa constant friend. (2)commit:v. ado(sth)wrong or illegal做错事，犯罪，犯错等 e.g.Women commit fewer crimes than men. b.say that(sb.)will definitely do(sth)or must do(sth.)承诺，保证（做某事， 遵守协议等) e.g.He has clearly committed his government to continuing economic reform. c.pledge devotion to(sb.or sth.)忠于（某个人，机构等） e.g.He wasn't yet ready to commit to the relationship. Phrases: commit a crime/error/murder/arson/suicide犯罪/犯错/犯谋杀罪/犯纵火罪/自 commit (sb.)to doing(sth.) 向某人承诺做某事 commit oneself to(sth.) 致力于 commit(sth.)to memory 把记住 commit (sth.)to paper 把写下来 commit(sth.)to flames 烧毁某物，将某物付之一炬 (3)Paraphrase the sentence. We should often practice the use of active words,those which frequently occur in everyday use,and leam by heart those useful words,while we only need recognize those words which occur less frequently in everyday situations. (4)Analyze the structure of the sentence(1) constant: adj. a. happening regularly or all the time 经常发生的，不断的 e.g. There was a constant stream of visitors to the house. e.g. 她的诊室不断有家长前来求助。 Her clinic has a constant stream of parents wanting help. b. staying the same 不变的，固定的 e.g. The truck was traveling at a fairly constant speed. c. loyal and faithful 忠实的 e.g. He is a constant friend. (2) commit: v. a. do (sth.) wrong or illegal 做错事，犯罪，犯错等 e.g. Women commit fewer crimes than men. b. say that (sb.) will definitely do (sth.) or must do (sth.) 承诺，保证（做某事， 遵守协议等） e.g. He has clearly committed his government to continuing economic reform. c. pledge devotion to (sb. or sth.) 忠于（某个人，机构等） e.g. He wasn’t yet ready to commit to the relationship. Phrases： commit a crime/error/murder/arson/suicide 犯罪/犯错/犯谋杀罪/犯纵火罪/自 杀 commit (sb.) to doing (sth.) 向某人承诺做某事 commit oneself to (sth.) 致力于 commit (sth.) to memory 把…记住 commit (sth.) to paper 把…写下来 commit (sth.) to flames 烧毁某物, 将某物付之一炬 (3) Paraphrase the sentence. We should often practice the use of active words, those which frequently occur in everyday use, and learn by heart those useful words, while we only need recognize those words which occur less frequently in everyday situations. (4)Analyze the structure of the sentence