1. 宇宙
    The universe is the whole of space and all the stars, planets, and other forms of matter and energy in it.

universe

    e.g. Einstein's equations showed the Universe to be expanding...
           爱因斯坦的方程式表明宇宙正在膨胀。
    e.g. Early astronomers thought that our planet was the centre of the universe.
           早期的天文学家认为我们的星球是宇宙的中心。

2. 经验领域
    If you talk about someone's universe, you are referring to the whole of their experience or an important part of it.

    e.g. Good writers suck in what they see of the world, recreating their own universe on the page...
           优秀的作家从他们眼中的世界汲取体验，然后在纸上重塑自己的天地。
    e.g. They marked out the boundaries of our visual universe...
           他们标出了我们视觉经验领域的界限。

3. 全天下，宇宙万物中（最）
    If you say that something is, for example, the best or biggest thing of its kind in the universe, you are emphasizing that you think it is bigger or better than anything else of its kind.

    e.g. According to my friends I am the coolest, thinnest, cleverest, funniest journalist in the universe.
           我的朋友说我是全天下最酷、最瘦、最聪明、最幽默的记者。