Ketonization
酮基化作用
🗣️ 情景例句
Nobody displayed any interest.
没人显得感兴趣。
Rain comes after sunshine, and after a dark cloud, a clear sky.
晴日之后有雨水，乌云过去见青天。
I know that he's doing his best, but he says that he is a little weak in Chinese.
我知道他非常努力，但他说他的中文有点儿差。