21) There are several/a number of reasons/factors for my choice/pursuit ( o f...)/fondness (for...)/adaptability (to...)/concentration (on...)/advocacy (of. ..)/belief (in...) (或my seeking/choosing to do sth.) (e.g. There are several reasons for my fondness for the sports.) 22) Among the factors that contribute to my achievement/choice/struggle/. .., three/a few shout louder/weigh more heavily/stand out. (e.g. Among the factors that contribute to my success in studies, three shout louder.) 23) The reasons/factors/causes for my love (of...)/interest (in...)/determination (to do sth.)/objection (to sth.)/...are varied and individual. (e.g. The reasons for my pursuit of the career are varied but individual.) 24) A variety of/Quite a few factors have led me to do sth. (e.g. Quite a few factors have led me to form the habit of collecting stamps .) 25) My outlook (on...)/choice (of...)/participation (in...)/devotion (to...) stems from/derives from/results from some/several chief factors. (e.g. My pleasant memory of my Chinese teacher stems from several chief fact ors.) 26) Our life/history/society abounds with/is rich in/is full of typical examples/illustrations.(e.g. 略) 27) Cases illustrative of this definition/truth/theory/principle/mechanism /saying/proverb are not rare/are too numerous to mention one by one/can be found everywhere in our life/society. (e.g. Cases illustrative of the saying—facts speak louder than words—are too numerous to mention one by one.) 28) To illstrate the theory in question, we can cite many examples.( e.g. 略) 29) According to my observation/knowledge, many examples from our real life can serve/be used (employed/cited) as good evidence for the definition in question.(e.g. 略) 30) This truth/principle/motto/popular saying/way of coping with sth. is/ h olds true for/goes for/can be applied to many/various matters/cases in our actual life. (e.g. The above theory can be applied to a variety of cases in our daily life.) 31) There are some/several/a few steps (measures/ways/methods/tricks/less o ns) you/a would-be beginner can follow (take/try/use/learn) to achieve your (his /her) goal/to realize your/his dreams/to the best advantage. (e.g. There are some clever tricks a would-be relaxer can learn to keep himself free of worry or stress.) 32) When/If sth. in question/you...it is better/advisable/necessary/essential (for you) to follow the instructions/courses/steps/schemes/ways as given/described below. (e.g. If your trouble builds up to the point where you can not put up with it, it is advisable for you to follow the instructions as given below.) 33) To do sth., one/you d better (not) go by/act upon/comply with some concrete/practical/sound/effective rules/regulations/orders/procedures/courses. (e.g. To break with the bad habits like smoking, you d better go by some effective instructions.) 34) For anyone/those who..., here are the best ways to... (e.g. For those who are anxious to make friends with the opposite sex, here are the best ways to remove all their anxiety.) 35) What/How/Why...then? (e.g. How does this small association develop into a nationwide organization ?) 36) If/When placed together to undergo a close/careful/sound/rational/all -sided comparison, they/the two subjects (parties) can reveal/show/manifest/display their resemblance/difference in...(some aspects)(e.g. 略) 37) Just as one can distinguish only by comparing(或Just as there can be n o differentiation without contrast), it is necessary/better/worthwhile to see/find out what will come of the contrast/comparison between A and B. (e.g. ...it is worthwhile to find out what comes of the contrast between the Western culture and the Eastern culture.) 38) In/Under/On different/similar situations/conditions/circumstances, how ever, the meanings/connotations/inspirations/lessons/doctrines/experiences/value s/implications/hints derived from (gained in) the same (different) thing(s) are similar/contrary/opposite to one another(或different from one other). (e.g. In different situations/Against different backgrounds, however, the values derived from the same incident are found contrary to one another.) 39) The best/only/nearest/sound way for us to understand/seize the essence /substance of..., however, is to put both/it against each other/different backgrounds/another thing (或...is to make a comparison/contrast between A and B). (e.g. The only way for us to get the sense/core of dishonesty, however, is t o put it against honesty.) 40) To..., however, no way works better than by comparing/contrasting A with B. (e.g. To see through this superstition, however, no way works better than by contrasting it with science.)