fixed value的意思是固定的数量
例子1=The distance from Ali's house to his school
例子2=The maximum tires for one car
varied value的意思是不一定的数量
例子1=The time Ali used to run across the field
例子2=The decibel of Ali's voice
就这样,希望可以帮到你!
P/S 画线部分是重点哦~