Saltpeter
n. 硝石, 硝酸钾, 硝酸钠\\n[化] 硝石
✅ 同义词
🗣️ 情景例句
If it ain't broke, don't fix it.
东西还没坏，就别急去修它。
Three times a week I have to walk all the way to the gym for my Phys Ed class.
一周有三次，我为了参加体育课而必须走路到体育馆。
Could you explain exactly what you do?
您能确切的解释一下你做些什么吗？