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burrow/ˈbʌrəu/ I.n.［c］洞穴：an animal’s burrow动物的穴The dog had chased a rabbit into its burrow.狗把兔子追进了洞穴。‖II.vt. &vi.挖地洞：burrow a hole打地洞The rabbits ···

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burst/bə:st/ I.vt.&vi.(burst, burst) (使)爆炸；破裂，突然发作：The balloon (bottle, tyre) burst.气球(瓶子，轮胎)爆了。He burst the chains that held him.他挣断了束缚自己的锁链。···

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bury/ˈberi/vt.1.埋葬：After the battle they buried the dead.战斗结束后，他们埋葬了死者。He was buried alive by the enemy.他被敌人活埋。2.隐匿: He buried his head in his hands.他双···

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bus/bʌs/n.［c］公共汽车：to take the No.12 bus乘12路公共汽车; to miss (catch) the bus错过(赶上)公共汽车；the No.3 bus 3路公共汽车How often do the buses run?公共汽车多长时间有一班?

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bush/buʃ/n.［c］1.矮灌木，丛枝灌木（cf.shrub&scrub）：beat around/about the bush旁敲侧击：He beat about the bush for half an hour without coming to the point.他拐弯抹角讲了半个···

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business/ˈbiznis/n.1.［u］事务，责任：Mind your own business.别管闲事。get down to business言归正传（见get条）on business因公，有事：I’m here on business, not for pleasure.我是有···

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bust/bʌst/ I.vi.& t. (busted或bust)爆裂；打碎；坏掉：The ballon busted.气球爆破；bust one’s arm折断手臂；bust a safe撬开保险箱‖II.n.［c］破产；（经济上的）崩溃，不景气：the ···

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bustle/ˈbʌsl/vt. &vi.（使）匆匆忙忙：She bustled us into the kitchen.她把我们赶进了厨房。She is always bustling about the house.她总是为家务忙个没完。

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busy/ˈbizi/adj.1.忙的，繁忙的：I’m sorry sir. The line is busy.对不起，先生，电话占线。2.热闹的：The shops are very busy before Christmas.圣诞节前商店很热闹。be busy doing忙于做…···

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but/bʌt, bət/ I.conj.然而，但是：He would like to go, but he can’t!他想去，可没法去。not only…but also不但…，而且…: He is not only our teacher but also (he is) our close frie···