精选优质文档-倾情为你奉上一.代替词 1.穷poor 可以用needy impoverished poverty-stricken 代替 2.幸福：happiness = cheerfulness = well-being 3.青少年：young people = youngsters = youths = adolescents 4.优点：advantage = merits = superiority = virtue 5.努力：struggle for = aspire after = strive for = spare no efforts for 6.从事： embark on = tap = set about = go in for 7.影响：influence= impac 8.危险：danger = perils =hazard 9.污染：pollution = contamination. 10.severe 替换掉serious（严重的） 11.special 替换成 distinct 12.want
