deep space

详细解释:太空

英语解释：

名词 deep space:

any region in space outside the solar system

例句：

One of the US astronauts who made the first deep space walk on the moon dropped a hammer and a feather together.一位首次在月球上进行太空行走的美国宇航员让一把锤子和一根羽毛一齐落下。