As the actual cost is smaller than the standard cost, it saves number as the favorabledifference, generally express with the negative number.
当实际成本小于标准成本，其节约数额为有利差异，一般用负数表示。
2
The Coca Cola and Pepsi Cola are of the two largest cola brands, the difference of which is always the favorable and heated topic.
可口可乐和百事可乐是全球最大的两个可乐品牌，他们之间的比较和差异，也一直是人们津津乐道的话题。
3
The accelerations of sled under different initial velocities were calculated and compared. The curves are similar and have small difference, so the system has the favorable stability.