vt.

1. 使不同；变更；修改
   He never varied his habits.

   他从未改变过自己的习惯。

2. 使多样化
   Teachers should vary their lessons to make them more interesting.

   为了增加趣味，教师应该使自己的课多样化。

3. 【音】变奏（曲调或主题）

vi.

1. 变化；呈多样化[（+in/on/with）]
   That sort of thing varies from person to person.

   那种事因人而异。

2. 偏离；违反[（+from）]
3. 【生】变异
4. 【数】成比例变化

v.

1. differ in size, degree, or nature from something else of the same general class:
   the properties vary in price.
2. change from one form or state to another.
   ▸modify or change (something) to make it less uniform.