52. at a loss 茫然,不知所措
53. at a time 一次,每次
54. at all costs 不惜一切代價
55. at all events 不管怎樣,無論如何
56. at all times 隨時,總是
57. at all 絲毫(不),一點也不
58. at any rate 無論如何,至少
59. at best 充其量,至多
60. at first sight 乍一看,初看起來
61. at first 最初,起先
62. at hand 在手邊,在附近
63. at heart 內(nèi)心里,本質(zhì)上
64. at home 在家,在國內(nèi)
65. at intervals 不時,每隔...
66. at large 大多數(shù),未被捕獲的
67. at last 終于
68. at least 至少
69. at length 最終,終于
70. at most 至多,不超過
71. at no time 從不,決不
72. at one time 曾經(jīng),一度;同時
73. at present 目前,現(xiàn)在
74. at someone's disposal 任...處理
75. at the cost of 以...為代價
76. at the mercy of 任憑...擺布
77. at the moment 此刻,目前
78. at this rate 照此速度
79. at times 有時,間或
80. aware of意識到
81. back and forth 來回地,反復地
82. back of 在...后面
83. back up后備,支援
84. bare of幾乎沒有,缺乏
85. be able to do能夠
86. be around差不多
87. be available to sb.可用,可供
88. be bound to一定
89. be capable of doing能夠
90. be concerned with 關心…,涉足…
91. be dying to渴望
92. be fed up with受夠了be tired of
93. be in hospital 住院
94. be in season 上市的/in peak season旺季
95. be in the mood to do sth. 想做
96. be pressed for time時間不夠
97. be tied up with忙于
98. be under the weather 身體不好
99. beat around the bush 拐彎沒角
100. beat the crowd 避開人群