Levonorgestrel
[医]乙羟基二降孕甾烯炔酮, 左旋-18-甲基炔诺孕酮
🗣️ 情景例句
Yes, I've been there a number of times.
我去过许多次了。
He received full credit for his studies at a previous school.
他在一所先前的学校取得了所有课程的学分。
What are you doing?
你在干什么？