Nitroguanidine
n. [化] 硝基胍
🗣️ 情景例句
Six words.
六个字。
The frog in well knows nothing of the great ocean.
井底之蛙不知汪洋大海。
Look at the rain! It's heavy, isn't it?
瞧这雨！下这么大，是吧？