grow into

grow into 逐渐成长为，变为

【例句】 

◆ He's grown into a fine young man．他已长成为一个英俊少年。

◆ But what began as nothing important in public affairs has grown into a social movement．但是一开始在公共事务中无足轻重的事情逐渐演变成了一场社会运动。（课标高考）