Something that is variable changes quite often, and there usually seems to be no fixed pattern to these changes.
The potassium content of foodstuffs is very variable.
食物中钾的含量差别很大。
variables
A variable is a factor that can change in quality, quantity, or size, that you have to take into account in a situation.
Decisions could be made on the basis of price, delivery dates, after-sales service or any other variable.
购买决定可能会基于价格、送货日期、售后服务或任何其他可变因素。
Other variables in making forecasts for the industry include the weather and the general economic climate.
对行业进行预测时还要考虑天气和宏观经济环境等其他不确定因素。