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1.brittle adj. 易碎的,脆弱的 [举一反三] 同 breakable, fragile [双语语境] Sometimes, the life of human being is as brittle as thin glass. 有的时候人的生命如玻璃一样容易破碎. [串联记忆] The two boys quarreled so much that their friendship became rather brittle. A. elastic B.strong C. fragile D. sturdy 2.bucket n.水桶,吊桶 [举一反三] 派 bucketful n. 一桶,一满桶 [串联记忆] The two sisters went up the hill and fetched a bucket of water. A.cup B.basin C.pail D.bag 3.bulk n.1.体积,容积||2.主体,大批,大量,大块 [双语语境]Its not their weight that makes these sacks hard to carry, its their bulk.这些袋子难以搬运,倒不是因为重而是体积大.|| The bulk of the work has already been done. 大部分工作已经完成. 4.bulletin n. 公报,公告,告示 [串联记忆]Here is the latest bulletin about the presidents health. A. conference B.report C film D.reel 5.bureau n. 署,局,司,处 [举一反三] 同 branch, department, office ,section,service [双语语境]Federal Bureau of Investigation. 联邦调查局 | 
