Nitropenta
四硝季戊四醇
🗣️ 情景例句
Notices are displayed on the bus asking people not to smoke.
公共汽车上张贴着请勿吸烟的公告。
Education begins a gentleman, conversation completes him.
人的教养始于教育，成于社交。
The fire service began to wonder whether a gas might have caused the fire.
消防部门开始怀疑有一种气体可能会导致火灾。