Or another example would be, if you're a phone company, you figure out who's central in the network and you ask those people, "Look, will you just text us your fever every day?
或者另一个例子， 如果你是电话公司，你能弄清楚谁在网络的中心， 然后你可以问这些人，“你们能不能把你们每天的发烧情况给我们发过来？