Raphite
钠硼解石
🗣️ 情景例句
No, but I've read enough about it.
不曾，不过我常常读到有关它的报导。
When did you know the answer?
你什么时候知道答案？
I would like to express to all of you here our sincere welcome.
让我向在座诸位致以最真挚的欢迎。’