Wathlingite
镁硬石膏
🗣️ 情景例句
Yes, it is.
是的。
According to Mr. Green,this is a complicated problem.
对于格林先生，这是一个复杂的问题。
and because there is so much of it the function would seem to e important.
睡眠占去那么多时间，所以其作用似乎还是很重要。