We frequently regard gases as compressible, liquids as incompressible.是什么意思？

We frequently regard gases as compressible, liquids as incompressible.

我们通常认为气体是可压缩的, 液体是不可压缩的.

we

pron. 我们，咱们，笔者，本人，朕，人们；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

frequently

adv. 频繁地，屡次地，往往，动，动辄；

例句
Women frequently say that they feel awkward taking the initiative in sex...
女人们经常说她们不好意思在性生活上采取主动。

regard

vt. 认为，注视，涉及，尊敬；vi. 凝视，留意；n. 凝视，留意，尊敬，问候；

例句
In many societies young men regard themselves as highly active, the agents of change, shapers of the world.
在许多社会中，年轻人将自己看成是高度活跃的分子，是变革的推动者和世界的塑造者。

Gases

[医]气体；

例句
These gases pollute the atmosphere of towns and cities.
这些气体污染了城镇的空气。

as

adv. 同样地，一样地，例如；prep. 作为，以…的身份，如

例句
As far as I can recall, Patti was a Smith.
我记得帕蒂是姓史密斯的。

liquids

n. 液体( liquid的名词复数 )；

例句
No liquids are served with meals because they interfere with digestion.
上饭菜时不要同时上汤水或饮品，因为这会影响消化。

incompressible

adj. 不能压缩的；

例句
An anomaly exists in the case of an incompressible fluid.
不可压缩流体是一种特殊情况.