H2
[医] 氘(音刀), 重氢
🗣️ 情景例句
It might be simpler and less expensive .
这样可能比较简单而且省钱。
Excuse me. Could you give me change for a dollar?
劳驾，你能不能换1元零钱给我？
The sea journey lasted over sixty days and nights.
海上航行持续了60多个昼夜。