478. utter  vt.發出，說出    adj.完全的，徹底的，全然的

(例) I could not utter a word. 我一句話也說不出來。

（例）He is an utter stranger to me. 對我來說，他是個完全陌生的人。

479．variation  n.變化，變動

(例) They say that this game is a variation of tennis.據說這種球賽是由網球變化而來的。

480.vehicle  n :交通工具

例)Are may be used as a vehicle for propaganda. 藝術可用作宣傳工具。

481.applause  n :鼓掌；稱贊

例)He sat down amid deafening applause. 他在震耳欲聾的掌聲中舊坐。

例)He new novel was greeted by reviewers with rapturous applause. 她的新小說被受書評家推崇。

482.appliance  n :器具 器械 裝置

例)Today house work has been made much easier by electrical appliances. 現在 家用電器使得家務活輕松多了。

483.consent  n :準許 同意

例)She made the proposal and I readily consented (to it). 她提出了這個建議，我欣然同意。

例)She won't consent to him staying out late. 她不允許他在外面太晚。

484.conquer  vt :征服

例)The Normans conquered England in 1066. 諾曼人于1066年征服了英國。

485.defect  n : 缺點 缺陷

例)The customer complained about the defective TV set he bought from the store. 顧客抱怨從這個商店買來的電視機有毛病。

486.delicate  a:精美的 易碎的 嬌弱的

例)One of his eyes was injured in accident,but after a delicate operation,he quickly recovered his sight. 他的一只眼睛在事故中受傷，但是經過精細的手術以后，他很快恢復了視力。

487.evolve  v:演變

例)Languages slowly but constantly evolve from older forms into new ones. 語言緩慢然而不斷地從較舊的形式發展到新的形式。

488.evolution  n :演變 變化

例)In politics Britain has preferred evolution to revolution. 在政治上，英國喜歡漸進而不喜歡革命。

489.frown  v/n :皺眉

例)What's wrong? Why are you frowning? 出什么事了？干什么皺著眉頭？

例)She looked up from her exam paper with a worried frown. 她看完自己的試卷愁眉不展地抬起頭來。

490.frustrate  v :使沮喪

例)He felt frustrated when he found he had difficulty with most of the maths problem. 當他發現大部分數學題都有困難時，感到很灰心。

491. guarantee vt./n. 保證   

例)The refugees are demanding guarantees about their safety before they return home。難民要求有關方面在他們返國前保證他們的人身安全。

492. guilty a. 內疚的；有罪的

例)She pleaded guilty to the crime。她認罪。

493. jealous a. 妒忌的

例)Tim seems to get jealous whenever Sue speaks to another boy。每當蘇跟別的小伙子說話，帝姆就吃醋。

494. jeans n. 牛仔褲

例)These jeans are a bit too tight。這條牛仔褲緊了點。

495. liquor n. 酒，烈性酒

例)His father likes liquor very much。他爸爸很愛喝酒。

496.liter/litre n. 升

例)There is a liter bottle of wine。有一瓶一公升的酒。