Mnng
N-甲基-N'-硝基-N'-亚硝基胍
🗣️ 情景例句
There's no doubt about that.
此事确定无疑。
Bread is the staff of life.
民以食为天。
I could see a snake, a bear, a wolf, but no people.
我还看见一条蛇、一只熊、一只狼，但没有看见人。