Conics
n. 锥线法, 锥线论
🗣️ 情景例句
Thanks, Mom.
谢谢，妈。
Today is the scholar of yesterday.
今天是昨天的学者。
so she sat down and accepted a cup of very strong tea, while he telephoned the police.
于是坐了下来，喝了一杯浓茶。与此同时，看门的人给警察挂了电话。