Dehydrite
高氯酸镁
🗣️ 情景例句
I've heard so much about you.
我知道很多关于你的事儿。
Let me give you a hand.
让我来帮您一下吧！
I want to take some books to the classroom. Could you help me, please?
我想把一些书拿到教室里，你能帮个忙吗？