•a variable interest rate不断变化的利率

•British weather is perhaps at its most variable in the spring.在英国，春季的天气可能是最变幻莫测的。

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•The variables in the equation are X, Y and Z.方程式中的变数是X，Y 和 Z。

•The data was analysed according to neighbourhoods, but other key variables like credit rating, job history, savings and marital status were ignored altogether.对这些资料按照所在街区进行了分析，但像信用等级、工作经历、存款情况、婚姻状况等其他关键变数则一概忽略不计。