Echinine
[化] 叔异戊烯色氨酸
🗣️ 情景例句
I was really worried.
刚才我真的很担心。
Do you usually learn French after school?
你通常在放学后学法文吗？
My name is Li Lei. I'm in Row 1, too. I'm Number 3.
我叫李磊。我也是第一排。我是3号。