Thymosterin
环氧麦角甾烯三醇乙酸酯
🗣️ 情景例句
Yes. When you get on the transfer bus, just show the bus driver this ticket stub.
要。当你上了转乘的公共汽车时，就把这张票根给司机看。
My brother wants to learn how to play the piano.
我的兄弟要去学弹钢琴。
Yes, it is.
是的。