The troposphere is the lowest part of the Earth's atmosphere, and most of the weather occurs here.

This is the most beautiful flower.

The troposphere is a part of the Earth's atmosphere, extending from the surface to about 10 kilometers.

The atmosphere of this planet is harmful to humans.

This table is low.

The ceiling of this room is low.

When the earthquake occurred, we evacuated immediately.

It is difficult to predict the occurrence of earthquakes.

The weather today is very good.

This lake's temperature is kept uniform by convection.