C13
[医] 碳13, 天然同位素碳(原子量13)
🗣️ 情景例句
Did you find the sandwich I made for you?
你找到我为你做的三明治了吗？
A house divided against itself cannot stand.
家庭内讧难维系。
Before? After? said the doctor.
“饭前？饭后？”医生说。