When the demand returns at or below the threshold level, resources instances that have been created are freed up and put to other use.
当负载需求回到临界值，或者降低到临界值之下时，所创建的资源实例会被释放给其他负载使用。
2
Investors are also pushing to add or raise hurdles, which require that general partners reach a certain threshold of returns before they start earning profits themselves.
投资者也极力增加障碍，要求普通合伙人在开始获得自身利润前必须达到特定的回报。
3
Checks the value of one or more counter samples against a threshold and returns a result that indicates the status of the counter relative to the threshold parameters specified by the rule parameters.