转变 (zhuǎn biàn): to change, to transform

He originally studied history, but later discovered he was more interested in computers, so he changed his major in his sophomore year.

Over the past decade, the economic structure of this small town has undergone a huge transformation, shifting from dependence on agriculture to developing tourism.

Since becoming a father, his attitude toward life has changed greatly; he no longer thinks only of himself but puts his family first.

As the weather gradually warms, the climate pattern in this region is slowly changing, and winters are becoming shorter and shorter.