52. at best 充其量,至多
53. at first sight 乍一看,初看起来
54. at first 最初,起先
55. at hand 在手边,在附近
56. at heart 内心里,本质上
57. at home 在家,在国内
58. at intervals 不时
59. at large 大多数,未被捕获的
60. at last 终于
61. at least 至少
62. at length 最终,终于
63. at most 至多,不超过
64. at no time 从不,决不
65. at one time 曾一度,从前
66. at present 目前,现在
67. at someone’s disposal 任……处理
68. at the cost of 以……为代价
69. at the mercy of 任凭……摆布
70. at the moment 此刻,目前
71. at this rate 照此速度
72. at times 有时,间或
73. be aware of 意识到
74. back and forth 来回地,反复地
75. back up 后备,支援
76. be available to sb. 可用,可供
77. be bound to 一定
78. be capable of 能够
79. be concerned with 关心……,涉足……
80. be dying to 渴望
81. be fed up with 受够了
82. be in hospital 住院
83. be in season 上市的
84. be in the mood to do sth. 有心情做某事
85. be pressed for time 时间不够
86. be tied up with 忙于
87. be under the weather 身体不好
88. beat around the bush 拐弯抹角
89. before long 不久以后
90. beside point 离题的,不相干的
91. beyond one’s ability 超越某人的能力
92. beyond question 毫无疑问
93. booked up 订完了
94. bound for 开往
95. break down 抛锚
96. break through 突破
97. break up with 和某人分手
98. bring about 引起;导致
99. by accident 偶然
100. by air 乘飞机
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