| 1. | The diaphragm draws air into the lungs . 横膈膜向下运动让空气进入肺部。 |
| 2. | A wide prospect opened below us . 向下看一片空阔的景色尽收眼底。 |
| 3. | Our lawn slopes down to the river . 我们的草地向下倾斜到河边。 |
| 4. | It exerts a force both sideways and downwards . 它还向侧和向下施加一个力。 |
| 5. | It runs down a shaft to the seventh floor . 它沿一个竖井向下直通到第七层。 |
| 6. | The child complied, and gazed down into the pit . 这孩子答应着向下望那井坑。 |
| 7. | The downward velocity of solids is sufficiently high . 固体的向下速度相当高。 |
| 8. | The skiers sped down the slope . 滑雪运动员飞快地向下滑去。 |
| 9. | He lay face downwards on his bed . 他脸向下伏在床上。 |