Selemion
一种均质离子交换膜
🗣️ 情景例句
The book is above me.
这本书我读不懂。
Because hs is thinking of majoring in this subject at the university.
因为他考虑把此学科作为在大学里的专业。
She is a composer for the harp.
她是位写竖琴曲的作曲家