Mean variation
平均变化
🧩 词语组成解析
mean
[min]
v. 表示…的意思;意思是;打算;产生…结果;
adj. 吝啬的;刻薄的;破旧的;残忍的;
n. 平均数;中间;几何平均;等比中数;
🗣️ 情景例句
How much do stamps cost?
邮票多少钱？
He has a writig brush.
他有一支毛笔。
A man who had broken his right leg was taken to hospital a few weeks before Christmas.
圣诞节前几周，某人摔断了右腿被送进医院。