Benzoylacetone
苯甲酰丙酮
🗣️ 情景例句
Do you happen to know...
你是否碰巧知道…
Go to bed with the lamb and rise with the lark.
早睡早起。
The further off this solid obstruction, the longer time will elapse for the return of the echo.
固体障碍物越远。回声返回所用时间就越长。