Nabla
纳布拉琴, 劈形算符(数学符号), 微分算符[子]
🗣️ 情景例句
I'd like to have you meet my foreman--
我希望带你去认识工头，
We must arrive there on time.
我们必须准时到那儿。
I'm going to give her a book.
我想送她一本书。