boom 低沉有回响的声音 The great bell tolled with a deep boom.

　　bore 钻孔，挖(通道) bore through a wall

　　bounce 弹起，反弹 The ball doesn’t bounce well.

　　sovereign a.独立的，有主权的 n.君主，国王，统治者

　　spacious adj.广阔的，宽敞的

　　spectrum n.谱，光谱，频谱;范围，幅度，系列

　　spicy a.加很多香料的;(口味)浓郁的

　　spine n.脊柱，脊椎;(动植物的)刺;书脊

　　bound 跳跃，弹回 She bounded to her feet and waved her right hand triumphantly.

　　boycott (联合起来)抑制，拒绝参加 boycott uncooperative manufactures

　　brace 托架，支架 He braced his muscles and lifted the weight.

　　breed (使)繁殖 Rabbits breed families rapidly.

　　bribe 贿赂 accept(或take)a bribe from sb.

　　anchor 锚 The anchor catches (drags).

　　annoy 使恼怒，使生气 She was annoyed at (with) his lightheard attitude.

　　annual 每年的，年度的 the annual output of steel

　　anonymous 匿名的，无名的 an anonymous letter (phone call)

　　anticipate 预期，预料 The directors anticipated a fall in demand (that demand would fall).

　　apart 成零碎 Such cheap clothes come apart after a few washings.

　　apparent 显然的，明明白白的 It was apparent that they all understood.

　　brisk 轻快的，生气勃勃的 a brisk pace

　　brittle 易碎的，一碰就破的 brittle glass

　　accumulate 积累，积攒，积聚 accumulate wisdom

　　accurate 准确的，精确的 an accurate estimate

　　accuse 指控，指责 They accused her publicly of stealing their books.

　　activate 使活动起来，使开始起作用，启动 They have planted secret agents in many countries who could be activated whenever needed.

　　bump 碰，撞(against, into) The truck bumped against the wall in the dark.

　　burst 爆炸，爆裂 The boiler burst.

　　casual 偶然的，无计划的，随便的，非正式的 a casual meeting

　　cease 停止，终止，结束 The music ceased suddenly.

　　certify 证明，证实 The accounts were certified (as) correct.

　　challenge 向...挑战 Our school challenged the local champion team to a football match.

　　character (事物的)性质，特质 The furniture in Tom’s apartment was pretentious and without character.

　　secure 安全的，可靠的，有把握的 a castle ～from attack

　　sensible 明知的，合情理的 a ～ choice

　　appoint 任命，委派 They appointed his father (to be 或as) postmaster.

　　appraise 估量，估计 appraise the infant's weight

　　appreciate 感激 I appreciated your help much.

　　apprehend 对...担心 Do you apprehend that there will be any difficulty?

　　appropriate 恰当的，相称的 Plain, simple clothes are appropriate for school wear.

　　approve 赞成，同意 I couldn't approve his conduct.

　　approximate 大概的，大约的，近似的 The approximate time is 10 o'clock.

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