Because you need to take the difference between two odometer readings to calculate the miles covered
问题描述：
Because you need to take the difference between two odometer readings to calculate the miles covered
for the gas used
cover for 这里.
不要翻译机
答
就是说因为你要对比这两种里程表来计算这些公里是用了多少油
也可以说是相当于的意思,或者是转化成的意思