1.assurance 相信，确保Progress is the activity of today and the assurance of tomorrow.
2.attainable 可抵达的They set the limits of performance attainable.
3.attempt 勤奋，妄图This is its first attempt to sell its own device.
4.attribute 属性;归因于It is preposterous to attribute to mere external conditions.
5.authorize 准许Please authorize payment of these invoices, and as soon as maybe.
6.automation 自动化技术Many workers have lost their jobs as a result of automation.
7.avail 有益于，效应I tried to laugh away her doubts, but it proved of no avail.
8.awkward 愚钝的I find myself in an awkward situation.
9.baffle 迷惑Philosophy and abstract thinking baffle them.
10.bankrupt 破产He realizes the bankrupt'sassets. (卖掉)
11.barely 只是Buy a just-barely-okay suit and take it to a good tailor.
12.bargain 讨价还价;合同书Don't miss out on a bargain again!
13.barren 贫乏的The barren land could produce little food.
14.barrier 阻碍Convertibility of the currency is a gargantuan barrier. (极大的巨大的)
15.betray 出售How can I betray mybenefactor?
16.bewilder 迷惑Some hard problems in arithmetic bewilderme.
17.bias 趋向，成见Some opponents complain of a racial biasin its application.
18.bibliography 推荐书目Weekly reading assignments will be distributed from a selected bibliography.
19.blast 发生爆炸，震波No one was hurt in the blast earlythis morning.
20.bleak 荒芜的,没希望的,不容乐观的 The future of the poor boy is bleak.
21.bloom 开花,面颊白里透红 The moist English air deepened the bloom of hercheeks.
22.blossom 开花，昌盛，发展趋势 Having no running for management, the career unable blossom.
23.blunder 犯大错，出错 He committed an astonishing blunder.
24.blunt 钝的，生涩的 Too much alcohol makes drivers mind blunt.
25.blush 脸发红 He began to blush because of nerves.
26.boom 兴盛 Economic enhancement makes national boom.
27.boost 推动 They can boost or derail anydecision.
28.bound 弹跳;拘束With one bound the dog wasover the wall.
29.breakdown 奔溃,归类,清单 The breakdownof the revenue must be presented.
30.breed 繁育Birds breed in the spring.