64. side by side 并排, 并肩
其它固定搭配
63. one by one 一个接一个
62. day by day 逐日
61. by spaceship 乘宇宙飞船
60. by the time …到……的时候
59. out of breath 上气不接下气
58. to one’s surprise 令人惊奇的是
57. to this day 知道今天
56. out of sight 消失,看不见
55. by the end of 到……结束时