例句與造句

1. A flat universe is also open
   平坦而開放的宇宙。
2. However , physicists inclined to believe that the total mass of the universe will be " just right " , that means it is enough to stop the expansion of the universe at last but is not enough to pull it back . hence , the universe is neither closed nor open but a flat universe
   不過，很多物理學(xué)家傾向相信宇宙中的物質(zhì)質(zhì)量不太多也不太少，膨脹會逐漸緩慢下來，但永遠(yuǎn)不會收縮，宇宙既非封閉也非開放，而是介乎兩者之間的平面宇宙。
3. It's difficult to find flat universe in a sentence. 用flat universe造句挺難的