Deutoxide
重水
🗣️ 情景例句
When trouble comes your neighbors are the ones who will be there.
邻居在你有困难的时候会帮助你。
No, not really. It doesn't make any difference.
没有，真的没有，没有不同看法。
Whether a planet can support life depends on the size and brightness of its star, that is its 'sun'.
一颗行星是否能够维持生命取决于它的恒星——即它的“太阳”——的大小和亮度。