Serogan
[化] 血清促性腺激素
🗣️ 情景例句
I did not notice it until yesterday.
我一直到昨天才注意到它。
A good beginning is half done.
良好的开端，就是成功了一半。
How should I tell him the bad news?
我该如何告诉他这个坏消息？