| 1. | Stars are as thick as the sand grains on a beach .
恒星像海滩上的沙子那样密集。 |
| 2. | Uranium coats sand grains .
铀被覆盖在砂岩颗粒上。 |
| 3. | On this scale the moon would be scarcely more than a dust speck about 1cm from the sand grain .
照这样的比例尺度，月球将是仅离小沙粒一厘米远的一颗尘埃微粒。 |
| 4. | If we could actually see the path described by a particle , such as a sand grain in the rock ,
假如实际上我们能看见由一个象岩石内部的砂粒这样的微粒绘出的轨迹。 |
| 5. | Influence of sand grain shapes on dry density of sediment
沙粒形状对泥沙干密度影响初探 |
| 6. | Interstice between sand grains
空隙砂粒 |
| 7. | For sand grains in water , the change in the direction of light is smaller than in air
在水里的沙，光的方向变动比在空气小。 |
| 8. | For sand grains in water , the change in the direction of light is smaller than in air
在水里的沙，光的方向变动比在空气小。 |
| 9. | " , we talked about the change in the direction of light i . e . scattering when hitting the sand grains
时提到光线射向沙粒时会改变方向即散射。 |
| 10. | The amount of light coming out depends on the change in direction when the light hits a sand grain
其实，光的明暗取决于光照射沙粒时的方向变化。 |
