Nitrourea
硝基脲
??? 情景例句
As far as English is concerned, he is second to none.
就英語來說，沒有人能夠比得上他。
I can come any time except Sunday.
除星期天外我都能來。
The best-known movie awards are the Academy Awards.
最著名的電影獎是奧斯卡金像獎。