Vary your routes and workouts, so you're not doing thesame runs over and over again.
改变您的路线和锻炼方式，那样你就不会一遍又一遍地做着相同的事情。
2
The number of subnodes can vary between sibling nodes at thesame level, but the type of all "Cousins" is identical.
子节点的数量在同一层上的兄弟之间可以不同，但所有“堂兄弟”的类型都是相同的。
3
Performance standards vary by the kind of business you are in, and may even vary by departments within thesame company, because of the variety of tasks involved.