Unit 5 A delicate world高频词汇 知识点清单 -2023-2024学年高中英语外研版（2019）选择性必修第二册

新教材外研版 英语选择性必修第二册 UNIT 5 UNIT 5高频词汇 知识点清单 Unit 5　A delicate world 高频词汇精讲 1. appetite n.胃口,食欲;强烈欲望 Unfortunately, the cats subsequently developed an appetite for the birds, too. 不幸的是,后来这些猫也对这些鸟类有了胃口。(教材P66) 情景导学 She has an amazing appetite for knowledge.她有惊人的求知欲。 People under too much pressure would sometimes suffer from muscle aches, headaches, tiredness, loss of appetite and so on. 压力太大的人有时候会经受肌肉疼痛、头痛、疲劳、食欲不振等的折磨。 (写作—压力与健康) 用法归纳 ①have a good/poor appetite胃口好/胃口不好 ②loss/lack 　of  appetite 食欲不振 ③have an appetite 　for    对……有欲望;渴望…… ④spoil/ruin one’s appetite 破坏某人的食欲;影响某人的胃口 特别提醒 appetite作“胃口”讲时既可用作可数名词(通常用单数形式),也可用作不可数名词;作“强 烈欲望”讲时是可数名词。 2.  decrease v.(使)变小;(使)减少n.减少;降低 But although the virus caused the rabbit population to decrease from 130,000 to around 10,000, it also meant less food for the cats. 然而,尽管该病毒导致兔子的数量从13万只减少到了1万只左右,可这也意味着猫的食物更少了。 (教材P67) 情景导学 They decreased the size of the group from 25 to 15. 他们把小组的规模从25人减少到了15人。 Arctic summertime sea ice is decreasing by over 7% this decade. 北极夏季海冰这十年减少超过了7%。 The number of cyclists running the red light is on the decrease. 骑自行车闯红灯的人数正在减少。 (写作—交通安全) There has been a progressive decrease in population every year in this city. 这个城市的人口在逐年递减。 用法归纳 ①decrease (from  ...)(to   ...)(从……)减少/下降(到……)(表示减少或下降后的结果) ②decrease 　by    ... 减少了/下降了……(表示减少或下降的幅度) ③on the decrease 在减少;在下降 ④a decrease　in   sth. 在某方面减少 情景助记 decrease to与decrease by的区别   词汇拓展 ①decrease作动词时与其近义词reduce、drop和fall的用法相同。 ②decrease与其反义词increase、rise的用法基本相同。 3. trap n.夹子;陷阱;圈套;困境 v.使陷入困境;卡住,夹住;设陷阱捕捉;使陷入圈套 In the 1980s,traps and dogs were used to catch the cats. 在20世纪80年代,夹子和狗被用来捕捉猫。 (教材P68) 情景导学 The police set/laid a trap for the guy and he really fell/walked into it. 警方给那个家伙设了个圈套,然后他真的中计了。 By clever questioning, they trapped him into making a confession. 他们用巧妙的提问诱骗他供认了。 A rescue worker risked his life saving two tourists who had been trapped in the mountains for two days. 一个救援人员冒着生命危险救了两个被困在山里两天的旅游者。 (2018北京) 用法归纳 ①set/lay     a trap (for sb.) (给某人)设圈套 ②fa