| 31. | Radium is a silver-white metal, which tarnishes rapidly on contact with air. |
| 镭是一种银白色的金属，它一接触空气就迅速失去光泽。
|
| 32. | The expedition was completely out of contact with civilization for months. |
| 探险队有好几个月和文明世界完全失去了联系。
|
| 33. | We must keep in contact with the masses. |
| 我们必须和群众保持联系。
|
| 34. | Keep your dog from contact with savage dogs. |
| 不要让你的狗与野狗接触。
|
| 35. | But here we come up against the most difficult of all obstacles to contact with people on other planets -- the astronomical distances which separate us. |
| 然而，在和外星人联系中我们遇到的最大困难是分隔我们的天文距离。
|
| 36. | I came in contact with her by telephone. |
| 我和她通过电话联络。
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| 37. | She cast her eyes down to avoid direct eye contact . |
| 她垂下双目以避免对视。
|
| 38. | It was Foinet with whom Philip first came in contact . |
| 菲利普首先与之建立联系的人就是福伊内特。
|
| 39. | She was brought into chance contact with him. |
| 她是偶然和他接触的。
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| 40. | contact a ship at sea by radio |
| 用无线电与海上的船只联络
|