Acetonyl urea
[機] 丙酮基
?? 詞語組成解析
丙酮基, 乙酰甲基
urea
[['ju?ri?]]
n. 尿素\\n[化] 脲; 尿素
??? 情景例句
He's writing to invite me
他寫信邀請我
He insisted that we all be in his office at one o'clock.
他要求大家一點鐘到他的辦公室。[大學英語四級]
We don't need it until next month.
我們要到下個月才用得著。