a complete change in the appearance or character of something or someone, especially so that that thing or person is improved

Local people have mixed feelings about the planned transformation of their town into a regional capital. 当地人对于要把他们的小镇变成地区中心城市的计划喜忧参半。

I'd never seen Jose in a tuxedo before - it was quite a transformation. 我之前从没见过何塞穿燕尾服——这可真是个天大的变化。