Nabla
纳布拉琴, 劈形算符(数学符号), 微分算符[子]
🗣️ 情景例句
Yes, I have been working in an advertisement company in the last two years.
是的，在过去两年里，我一直在一家广告公司工作。
The efficiency is greatly raised,and the intensity of labor is decreased.
工作效率大大地提高了，而劳动强度却降低了。
not because he cannot afford, or shuns, their meterial comforts, but because he is afraid of them.
这并不是因为他们付不起钱，也不是为了躲避物质享受，而是因为他们害怕酒店。