variation
US /ˌver.iˈeɪ.ʃən/
UK /ˌver.iˈeɪ.ʃən/

1.
变化, 差异, 变动
a change or difference in condition, amount, or level, typically within certain limits.
:
•
There is a wide variation in prices for similar products.
类似产品的价格存在很大差异。
•
The temperature showed little variation throughout the day.
气温全天没有太大变化。