1. The Moon is likely to become the industrial hub of the Solar System, supplying the rocket fuels for its ships, easily obtainable from the lunar rocks in the form of liquid oxygen.
    月球很可能成为太阳系的工业中心。从月球上的岩石中很容易提炼出液态氧，作为航天飞船的燃料。

2. This time she does manage to swallow some liquid and weakly says, "Thank, you."
    这次她终于咽了一些，并轻轻说了声："谢谢，你。"

3. He dips his forefinger into the liquid.
    他将食指浸到液体里。

4. He noticed that a river of liquid rock was coming towards him.
    他发现有一股岩浆正向他流过来，

5. Air is a fluid but not a liquid, while water is both a fluid and a liquid.
    空气是流体不是液体, 水是流体也是液体.

6. Vapour can be changed into liquid by cooling.
    蒸气可以通过冷却变成液体。