Polynitrobenzene
聚硝基苯
??? 情景例句
Where do you go to school?
你在哪里上學？
It was a real pleasure for me to do it.
我很樂意這樣做。
Insuring public or private property is a standard practice in most countries in the world.
承辦公共財產或私人財產保險是世界上大部分國家的正常業務。