by 
Pinyin: biàn huà
Chinese: 变化 n. /v.
English: change
Example sentence：
Zhèxiē dōu shì qìhòu biànhuà dǎozhì de
这些都是气候变化导致的。
These are caused from the climate changing.
Wǒde jiāxiāng yǒu le hěn dà de biànhuà.
我的家乡有了很大的变化。
My hometown has changed a lot.
More Details about word “change”：
http://www.talkinglearn.com/en/Chinese_English_Dictionary?word=change
