Boundstone
黏结灰岩
🗣️ 情景例句
That's for a long distance call you make two nights ago.
这是你两天前打的一个长途电话的费用。
I'm awfully sorry.
真是对不起。
There is a new type of machine which can produce colour copies.
有一种新型的机器能够制作出彩色复印件。