Generatrix
n. 母点, 母线, 母面
🗣️ 情景例句
Why not?
为什么不能？
Do you ever learn Chinese during the holidays?
你曾经在假日期间学中文吗？
He agreed that a train did come into the station at the time on the paper and that it did stop, but only to take on mail, not passengers.
搬运工说，正如纸条所说，确有一趟火车在那个时刻到站，但它只停站装邮件，不载旅客。