take the place of ... gradually
replace ... (one's place) gradually
substitute for ... gradually
gradually也可以用其它词代替,代替还可以用被动语态
另外：substitute A for B 用A取代B
replace A with B 用B取代A
也就是for的后面被取代,with的后面用来取代别人
噢,刚学的,差点又忘了,写下来以便随时查看