87. on business 出差办事.　­

86. take the floor 起立发言　­

85. in bulk 成批地,不散装的　­

84. in brief(=in as few words as possible)简言之　­

83. out of breath 喘不过气来　­

82. boast of (or about) 吹嘘　­

81. on board 到船上, 在船上, 上火车或飞机　­

80. in blossom开花(指树木) be in blossom开花(强调状态) come into blossom开花(强调动作)　­

79. blame sb. for sth. 因…责备某人 . blame sth. on sb. 把…推在某人身上　­

78. by birth 在出生上,论出身,按血统 at birth 在出生时; give birth to 出生　­