低气压的英文：
hypobaric
infrabar

A depression usually brings bad weather.
低气压往往带来坏天气。

In meteorology, depression is an area of low atmospheric pressure with associated weather phenomena
在气象学中，低气压是一个与气候现象有关的低气压领域。

The barometer recorded a low pressure.
气压表标明有一低气压。

This is an another low moving in from the Atlantic
这是从大西洋西移的另一个低气压区。

A region of atmospheric pressure that is below normal.
低气压区大气压低于正常值的地区

Gravity pulls the dense air back down forming the trough.
重力把密度大的空气吸引回来，形成了低气压槽。