52. be characteristic of: 典型的，显著的 The aurora is a phenomenon characteristic of the Polar Regions. 极光是极地特有的自然现象。
53. move out: 搬迁，离开 表摆脱：move out of; cast off; get rid of; shake off; free oneself from; get over It will be some time before the economy will move outof the current stagnation. 经济还需要一段时间才能走出低迷。
54. make the most of: 充分利用 同义：make the best/most/utmost of; take full advantage of; get the utmost out of You should make the most of this rare opportunity to demonstrate your talent. 你应该充分利用这个难得的机会来展示你的才华。
55. or so : 大约 However hard you try, you cannot finish it in a week or so. 你再怎么努力，也不可能在一两个星期内做完。
