Bcnf
BCNF范式
🗣️ 情景例句
She was sick so the didn't attend her classes.
她生病了，所以没上学。
I'm going to be late.
我要迟到了。
When you think of the innumerable birds that one sees flying bout,
你可以想象出天上有看得见的飞来飞去、数不清的鸟，