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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) | 
