VOA慢速英语:Was The Planet Mars Less Red Long Ago?

短语讲解：

1. The planet Mars has gone through an ice age and is now warming up, scientists say.

warm up 使热; 变热; （使） 更活跃
例句：Your feet will soon warm up once you get indoors.
你一进屋,脚就会很快暖和起来。

2. The information they gather will help scientists look for evidence of life beyond Earth.

look for 寻找（某人或某物）
例句：I look for you everywhere continuously!
我一直在到处找你！