1.bold a．勇敢的，大胆的(showing a fearless daring spirit)
联想记忆：b+old(年长)--年长的人通常比较胆大--勇敢的，大胆的
例:In 1928 he took the bold step of threatening a strike against Pullman.
派生词:boldface(n．黑体字)
2.bolster v.支持(to support)；鼓励(to give a boost to)
例:The proposed legislation failed to bolster workplace safety regulations.
3.bolt n.螺栓(metal pin with a head at one end, and a thread)；雷电(a lightning stroke, thunderbolt)
联想记忆：大胆( bold)不怕雷电(bolt)劈
例:a lightning bolt闪电，霹雳//All of the fasteners, such as bolts and screws have for several years been supplied by Brindon Bolt Barn.
4.bombard v.炮轰，射击(to attack especially with artillery or bombers);n.射石炮(a late medieval cannon used to hurl large stones)
词根记忆：bomb(轰炸)+ard --炮轰
例:A team of scientists has recently provided evidence of Earth being bombarded daily with as many as 40,000 small comets, which vaporize in the upper atmosphere and fall to Earth as rain.
派生词：bombardment(n.轰炸，炮击)
5.bona fide a.可信的(authentic)；真诚的，真实的(genuine)
例:the bona fide bills正当票据
6.bond n.结合(a uniting force or tie a ltnk)；债券（certificate issued by a govern-ment or a company acknowledging that money has been lent to it and will be paid back with interest);v.(使）结合( to cause to adhere firmly)
发音记忆：“绑得”--绑在一起一结合
例:Customer loyatty programs are attempts to bond customers to a company and its products and services.
派生词：bonded(a．束缚的，结合的)；bondage(几，束缚)
7.bonus n.奖金，红利(dividend)
联想记忆：bon(好的)+us(我们)一发奖金啦，我们都说好！一奖金
例:A union contract specifies a 6 percent salary increase plus a $450 bonus for each employee.
8.boom v.迅速发展(to grow rapidly in economy)；兴旺(flourish)；n．繁荣( vigorous growth)
例:Enrollment figures boom during these periods.//The current economic boom ends and consumers can no longer buy major luxury items.
9.boomerang n.回飞棒(a bent or angular throwing club designed to return near the thrower)：自食其果的言行(an act or utterance that backfires on its originator)
例:boomerang effects回旋效果
10.boost v./n.推，举（to lift）；促进(to promote)；吹捧(to praise)
例:The jet engine could help boost cargoes into space at significantly low costs.//Citizens want the government to take action to boost the economy.