Nonnegative
a. [数]非负的,正的,零的
🗣️ 情景例句
I was wondering if you could help me. I'd like to know.
不知道你能否帮助我，我想知道。
What is thelargest industrial center in this country?
这个国家最大的工业区是哪里？
When a servant opened the door to fetch some wood, I spoke to her and persuaded her to let me in.
一个仆人开门取柴火时，我和她说话，并说服她让我进去。