| 51. | Air consists chiefly of nitrogen. |
| 空气主要由氮气组成。
|
| 52. | There's quite a chill in the air this morning. |
| 今晨空气很寒冷。
|
| 53. | A frank discussion can help to clear the air . |
| 坦率的谈论有助于消除疑虑。
|
| 54. | Blood coagulates in air . |
| 血液遇到空气就凝结。
|
| 55. | Air coagulates blood. |
| 空气能使血液凝结。
|
| 56. | The sea air coarsened her skin. |
| 海上的空气使她的皮肤粗糙了。
|
| 57. | The fresh air brought colour to her cheeks. |
| 因空气新鲜,她双颊红润。
|
| 58. | A further complication was Fred's refusal to travel by air . |
| 更麻烦的是弗雷德不肯坐飞机。
|
| 59. | She handed the note to me with a conspiratorial air . |
| 她鬼鬼祟祟地把字条交给了我。
|
| 60. | The spear curved through the air . |
| 标枪在空中沿曲线运动。
|