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