478. utter  vt.发出，说出    adj.完全的，彻底的，全然的

(例) I could not utter a word. 我一句话也说不出来。

（例）He is an utter stranger to me. 对我来说，他是个完全陌生的人。

479．variation  n.变化，变动

(例) They say that this game is a variation of tennis.据说这种球赛是由网球变化而来的。

480.vehicle  n :交通工具

例)Are may be used as a vehicle for propaganda. 艺术可用作宣传工具。

481.applause  n :鼓掌；称赞

例)He sat down amid deafening applause. 他在震耳欲聋的掌声中旧坐。

例)He new novel was greeted by reviewers with rapturous applause. 她的新小说被受书评家推崇。

482.appliance  n :器具 器械 装置

例)Today house work has been made much easier by electrical appliances. 现在 家用电器使得家务活轻松多了。

483.consent  n :准许 同意

例)She made the proposal and I readily consented (to it). 她提出了这个建议，我欣然同意。

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

484.conquer  vt :征服

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

485.defect  n : 缺点 缺陷

例)The customer complained about the defective TV set he bought from the store. 顾客抱怨从这个商店买来的电视机有毛病。

486.delicate  a:精美的 易碎的 娇弱的

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伤，但是经过精细的手术以后，他很快恢复了视力。

487.evolve  v:演变

例)Languages slowly but constantly evolve from older forms into new ones. 语言缓慢然而不断地从较旧的形式发展到新的形式。

488.evolution  n :演变 变化

例)In politics Britain has preferred evolution to revolution. 在政治上，英国喜欢渐进而不喜欢革命。

489.frown  v/n :皱眉

例)What's wrong? Why are you frowning? 出什么事了？干什么皱着眉头？

例)She looked up from her exam paper with a worried frown. 她看完自己的试卷愁眉不展地抬起头来。

490.frustrate  v :使沮丧

例)He felt frustrated when he found he had difficulty with most of the maths problem. 当他发现大部分数学题都有困难时，感到很灰心。

491. guarantee vt./n. 保证   

例)The refugees are demanding guarantees about their safety before they return home。难民要求有关方面在他们返国前保证他们的人身安全。

492. guilty a. 内疚的；有罪的

例)She pleaded guilty to the crime。她认罪。

493. jealous a. 妒忌的

例)Tim seems to get jealous whenever Sue speaks to another boy。每当苏跟别的小伙子说话，帝姆就吃醋。

494. jeans n. 牛仔裤

例)These jeans are a bit too tight。这条牛仔裤紧了点。

495. liquor n. 酒，烈性酒

例)His father likes liquor very much。他爸爸很爱喝酒。

496.liter/litre n. 升

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