1. He looked through all the sand, but there was nothing to be seen.
    他翻看了这些沙，却没发现什么。

2. He was still riding a bicycle, and he still had the buckets of sand.
    他仍然骑着一辆车，带着两桶沙。

3. Another officer checked the sand. Nothing again.
    另一海关官员检查了沙，还是没发现什么。

4. Sand loses its heat quickly.
    沙散热快。

5. Shake the sand out of your shoes.
    把鞋子里面的沙子抖出来。

6. Get a shovel , so that we can dig a hole in the sand.
    拿个铲子来，我们好在沙中挖个洞。

7. Gold is sifted from sand.
    金从沙里淘出来。

8. One day, walking along the sands towards his boat, Crusoe saw in the sand the mark of a man´s foot.
    一天, 克鲁索沿着沙滩走向他的小船时, 看到沙地上有一只人的脚印.

9. If we could actually see the path described by a particle, such as a sand grain in the rock,
    假如我们真能看到诸如岩石中一个沙粒子的运动轨迹，