C13
[医] 碳13, 天然同位素碳(原子量13)
🗣️ 情景例句
Safety first.
安全第一。
To know one's self is true progress.
能有自知之明就是真正的进步。
He was greeted by an unpleasant smell which convinced him that I was telling the truth.
一股怪味袭来，使他相信了我说的真话。