change (something) up
phrasal verb with change verb uk/tʃeɪndʒ/ us/tʃeɪndʒ/
US在某事上做出改变（以求改善）
to change something, especially in order to improve it
If something's not working, they change up. 要是某事不奏效，他们就会做出改变。
We talked with the dietitian about changing up the menu. 我们和营养师谈过更改菜单的问题。