n.平均水平( average的名词复数 )；（速度等的）平均率；平均估价； 双语释义：n.(名词)[C]平均,平均数 the result of adding several amounts together, finding a total, and dividing the total by the number of amounts[U]平均水平; 一般水准 a level which is usualadj.(形容词)[A]平均的 calculated by adding several amo