由于政治、经济的变化，人和人的关系也改变了。

Interpersonal relations have changed as a result of the changes in politics and the economy.

山区面貌大有改变。

The appearance of the mountain areas has changed massively.

改变方针

change policy

改变生活方式

change one's lifestyle

改变环境

change the environment

改变方向

change direction

改变常态

change the norm

改变手法

change method

改变领导作风

change leadership style

改变自己的看法

change one's views

改变现状

change the current situation

改变立场

change one's standpoint

改变队形

change formation

改变信念

change one's beliefs

改变话题

change the subject

骤然改变自己的生活

dramatically change one's life

我国已经初步改变了南粮北调的局面。

China has already started to change the pattern of grain from the South being diverted to the North.