vary/ˈver.i/动词改变;更改Some people give a regular monthly donation while others vary the amount they give.有些人每月捐赠固定数目的钱款,而有些人每月捐赠的数额多少不一。(使)不同;(使)呈现差异The samples varied in quality but were generally acceptable.这些样品质量有差异,但是大体上可以接受。想跟读,去练习