55. 粗略地了解 get a rough idea of
54. 为…留下空间 make room for
53. 在(做)某事中起着重要作用 play an important role/ part in
52. 抢劫某人某物 rob sb of sth
51. 冒着失去生命的危险 risk losing one’s life
= run/ take the risk of losing one’s life
50. 在某人的右面 on one’s right
49. 摆脱,除去 get rid of = remove
48. 因---而用…来酬谢某人 reward sb with sth for sth
47. 导致 result in
46. 由…导致;由---引起 result from