81.   on board 到船上, 在船上, 上火车或飞机
82.   boast of (or about) 吹嘘
83.   out of breath 喘不过气来
84.   in brief(=in as few words as possible)简言之
85.   in bulk 成批地,不散装的
86.   take the floor 起立发言
87.   on  business 出差办事.
88.   be busy with sth.于某事            。                                be busy doing sth. 忙于做某事
89.   last  but  one  倒数第二.
90.   but  for (=without)  要不是. 表示假设
91.   buy sth. for…money  用多少钱买
92.   be capable of  能够, 有能力
be capable of being +过去分词:是能够被…的
93.   in any case(=for love or money, at any rate, at any price, at any cost, whatever happens; anyhow)无论如何94.    in case (=for fear that) 万一;
95.   in case of (=in the event of)如果发生…万一
   in the case of 至于…, 就…而言
96.   in no case在任何情况下都不(放句首倒装句)
97.   be cautious of 谨防
98.   center one’s attention on(=focus one’s attention on) 把某人的注意力集中在…上
99.   be certain of (=be sure of) 有把握, 一定.
100. for certain of (=for sure )肯定地,有把握地