31. 太空睡袋 space sleeping bag
32. 准备做某事 prepare to do sth.
33. 愿意做某事 be willing to do sth.
34. 在太空旅行 travel in space
35. 在地球的表面 on the surface of Earth
36. 在电脑的控制下 under the control of computers
37. 以 ……. 开始 start with…= begin with…
38. 搬到地球之外 move out of Earth
39. 第一个住在火星上的人 the first to live on Mars
40. 让某人做某事 have/make/let sb. do sth.请某人做某事（让某事被做） have sth. done
41. 担心（做某事） worry about (doing) sth.= be worried about (doing) sth.
42. 某事让某人担心 sth. worry sb.
43. 害怕做某事 be afraid of doing sth. = be afraid to do sth.
44. 让某人远离 ……. keep sb. away from ….
45. 花费某人一些时间做某事 It takes sb. some time to do sth.
46. 阻止某人做某事 keep/stop/prevent sb. from doing sth.
47. 防止飘浮 prevent floating
48. 拍高质量的图片 take high-quality images
49. 有许多存储空间 have lots of memory space
50. 被储存很多个月 be stored for many months
51. 地球直径的一半 one-half the diameter of Earth
52. 不太阳系里 in the solar system
53. 很难发现 be hard to find
54. 最不重要的 the least important
55. 代替 …….( 动词短语 ) take the place of ….
56. 坐在窗户旁边 sit by the window
57. 匆匆浏览；快速阅读 run over
58. 值 be worth = cost 值得做某事 be worth doing sth.
59. 2100 年火星生活指南 a guide to living on Mars in 2100
60. 某个安静的地方 somewhere quiet
61. 更喜欢做某事 prefer to do sth.
62. 起飞 take off
63. 确信某事；对某事有把握 be sure/certain of 确信做某事；有把握做某事 be sure/certain to do sth.
64. be sure/certain _+ that 宾从