Polyhydroxyketone
[医] 多羟酮
🗣️ 情景例句
You'll never get to college to find out, Robbie,
你根本就进不了大学去探究这个问题的答案 ，Robbie，
Early start makes easy stages.
早开始是成功的保证。
What was the matter?
怎么啦？