C13
[医] 碳13, 天然同位素碳(原子量13)
🗣️ 情景例句
I'm glad to make you acquaintance.
我很高兴认识你。
Two heads are better than one.
集思广益。
But some people don't want good farmland to be built on.
但有些人不愿意把好的农田用来建造厂房。