Celestobarite
锶重晶石
🗣️ 情景例句
I see.
哦。
I left the house at 8 o'clock and got to work at 8:30.
我在8点钟离开了房子并且在8:30上班了。
He'll return to London the week after next.
再下个星期他将返回伦敦。