Collinsite
淡磷钙铁矿
🗣️ 情景例句
How old are you, Albert?
几岁啦， Albert？
Should I take the bus?
要乘公共汽车吗？
In the 1970s, computers were common enough, but only in big business, government departments, and large organizations.
在70年代，计算机已经相当普及了，但只用在大公司，政府部门和大的组织之中，