The atmosphere of Mars could not support life.

生命无法在火星的大气环境下生存。

《牛津词典》

The atmosphere of Mars is not so dense as that of the earth.

火星的大气密度不及地球的大。

youdao

But Yinghuo 1 will also be exploring the upper atmosphere of mars-aiming to discover why water vanished from the red planet.

但“萤火虫1号”也将探索火星的外大气层，目的是找出这颗红色星球上水消失了的原因。

youdao

The atmosphere of Mars today is like the Earth's atmosphere is like at 100, 000 feet.

NPR: Revisiting the Viking Missions to Mars

There were instruments to measure the composition of the atmosphere of Mars as it entered the atmosphere.

NPR: Revisiting the Viking Missions to Mars

In order to have liquid water at the surface, the atmosphere of Mars had to be considerably thicker than it is today.

NPR: Revisiting the Viking Missions to Mars