Presidon
[醫(yī)] 二乙吡啶二酮, 3,3-二乙基-2,4-二氧四氫吡啶
??? 情景例句
My company was the contractor.
我的公司承包了這項(xiàng)工程。
Drunken days have all their tomorrows.
今日花天酒地，明日潦倒窮途。
Her family are all music lovers.
她全家人都是音樂愛好者。