Nabit
硝甘炸药
🗣️ 情景例句
He seems to be getting on very well at school.
他在学校似乎过得很好。
Leave me be.
让我一个人静一静。
One is the general atmosphere of secrecy in which it is carried out,
一是科研工作中普遍存在的保密气氛；