Quadric
a. 二次的\\nn. 二次曲面
🗣️ 情景例句
you can pay the mortgage every month.
你们能每月按时付款。
For one thing,I've got to drop by the bank to get some money.
首先，我得去银行取一些钱。
The children shouted to the driver, but he did not hear them.
孩子们对着司机喊叫着，但是他没有听见。