英语题目describethedifferencebetweenaconstantandacontrol用英语来描述/回答,大意是描述自变量和应变量的区别,>3

Question

英语题目describe the difference between a constant and a control
用英语来描述/回答,大意是描述自变量和应变量的区别,>3

Answer 1

严格说来这两个术语并无容易混淆的地方：
A constant is something unchanged in an experiment,e.g.sunlight,temperature,etc.
A control,on the other hand,is the object you compare it to.Say,for example,you want to see if coffee helps plants grow,you'd plant two plants.In one,you add coffee,the other without.The one without would be the control.
但 constant 和 variable 倒是可比：
A constant means a factor which remains the same and doesn't change while a variable is the one which can vary according to situation.