Codifferential
上微分
🗣️ 情景例句
It is OK to ask children how old they are.
问小孩多大了是可以的。
I ask him to stay at school.
我要求他待在学校。
Towards evening, the boat struck a rock and the girl jumped into the sea.
天将黑时，小船撞在了一块礁石上，姑娘跳进了海里。