When we talk about the universe, we mean the earth.
当我们谈论起宇宙时，就是指地球。
When we talk about the universe, we mean the earth, the sun, the moon and the stars and the space between them.
当我们谈到宇宙时，我们的意思就是指地球、太阳、月亮、星星以及他们之间的空间。
When we talk about the universe, we mean the earth, the sun, the moon and the stars, and the space between them.
当我们谈论宇宙时，我们指的是地球、太阳、月亮、星星和它们之间的空间。
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