vt.& vi. 专心于，注意，集中，聚集；vt. 浓缩，（使）浓缩，[采矿]汰选，选矿，精选，富集；vi. 凝缩，浓缩，提纯；n. 浓缩物；adj. 集中起来的，经过浓缩的；
[例句] It was up to him to concentrate on his studies and make something of himself...
[例句] Water companies should concentrate on reducing waste instead of building new reservoirs...
n. （美）钱，元，雄鹿，花花公子；vt.& vi. （马等）猛然弓背跃起，抵制，猛然震荡；
[例句] That would probably cost you about fifty bucks...
[例句] Why can't you spend a few bucks on a coat?...
adj. 空白的，空的，无信息的，未填写的，茫然的，空虚的；n. 空的空间或地点，填空处，空白表格，坯，无用的东西；vt. 消失，挡住通路，[体育运动] 阻止（对手）得分，打孔，盖印；vi. 走神，逐渐消失；
[例句] We could put some of the pictures over on that blank wall over there...
[例句] He tore a blank page from his notebook.
n. 带，乐队，衣带，价
[例句] He was a drummer in a rock band...
[例句] Local bands provide music for dancing.
adj. 单独的，独一无二的，独自的；adv. 单独地，独自地，孤独地，只，只有；
[例句] There is nothing so fearful as to be alone in a combat situation...
[例句] He was all alone in the middle of the hall.
v. 知道( know的第三人称单数 )，看到过，听到过，经历过；
[例句] I don't know the name of the place...
[例句] I know that you led a rifle platoon during the Second World War...
vt. 饲养，养育，抚养，养育；vt.& vi. 抬起；n. 后部，背面，背后，臀部，（舰队或军队的）后方，后尾，殿后部队，〈英口〉厕所；vi. 直立，高耸；adj. 后面的，后部的；
[例句] He settled back in the rear of the taxi.
[例句] ...a stairway in the rear of the building.
n. 飞行员，引航员，向导，[机械学]导向器（或轴）；vt. 驾驶，试验，试点，为（船舶）引航（或操舵）；adj. 试验性的，导向的，驾驶员的，辅助的；
[例句] He spent seventeen years as an airline pilot.
[例句] ...fighter pilots of the British Royal Air Force.
adj. （人、树木、鸟或动物）成熟的，仔细考虑过的，到期（应该支付）的，成年人的；vi. 成熟，长成，（票据等）到期；vt. 使…成熟，使…长成，慎重拟定（计划等）；
[例句] You will learn what to expect as your child matures physically...
[例句] The eggs hatched and the chicks matured.
vt. 承认，同意，准许，授予；n. 拨款，补助金，授给物（如财产、授地、专有权、补助、拨款等）；vi. 同意；
[例句] They'd got a special grant to encourage research...
[例句] Unfortunately, my application for a grant was rejected.
n. 功能，作用，应变量，函数，职务，重大聚会；vi. 有或起作用，行使职责；
[例句] The main function of the merchant banks is to raise capital for industry.
[例句] The authorities say the prison is now functioning normally...
vi. 闪耀，闪光，燃烧，突然发怒，向外张开；vt. 使闪耀，使张开，用光发出信号，使外倾；n. 闪光，爆发，反射，太阳耀斑；
[例句] ...a ship which had fired a distress flare.
[例句] Camp fires flared like beacons in the dark.
n. 因素，因子，代理人；vt. 把…因素包括进去，[数学]分解…的因子，将…分解成因子，以代理商（或管家等）的身份行事，做代理商（或管家）；vi. 做代理商（或管家）；
[例句] Physical activity is an important factor in maintaining fitness.
[例句] The cost of butter quadrupled and bread prices increased by a factor of five.
vt.& vi. 阻止，扼止，填塞，使窒息，哽咽；n. 窒息，哽咽，拥塞，（车辆发动机的）阻风门；
[例句] The coffee was almost too hot to swallow and made him choke for a moment...
[例句] A small child could choke on the doll's hair...
vt. 追捕，追求，追寻，镂刻；n. 追捕，打猎，猎物（指鸟兽等），槽；vi. 追逐，追赶，追寻，追求（常与after连用），[口语] 奔跑；
[例句] She chased the thief for 100 yards...
[例句] He said nothing to waiting journalists, who chased after him as he left.
n. 现金，支付金额；vt. 支付现款，兑现；adj. 现金的；
[例句] ...two thousand pounds in cash.
[例句] ...a state-owned financial-services group with plenty of cash.
vt. 感激，欣赏，领会，鉴别；vi. （使）增值，涨价；
[例句] Anyone can appreciate our music...
[例句] In time you'll appreciate the beauty and subtlety of this language.
n. 伴星，伴引血管；v. 来（ come的第三人称单数 ），到达，达到（认识、理解或相信的程度），出生；
[例句] Two police officers came into the hall...
[例句] Come here, Tom...
n. 保证，誓言，[法]抵押权，公约，（表示友谊的）干杯；vt.& vi. 使发誓，保证，典当，抵
[例句] The meeting ended with a pledge to step up cooperation between the six states of the region.
[例句] ...a £1.1m pledge of support from the Spanish ministry of culture.
n. 共轭（马、骡），跨度，墩距，一段时间，[航] 跨绳；vt. 缚住或扎牢，跨越时间或空间，以掌测量，以手围绕测量类似测量；
[例句] The batteries had a life span of six hours...
[例句] Gradually the time span between sessions will increase.