Principle 4 — establish a fair or acceptable level of performance for a task, and then develop a pay system that provides a reward for performance above the acceptable level.
原则4 - - -建立一个公平的或可接受的水平，表现为一个任务，然后制定一个支付系统，提供奖励业绩高于可接受的水平。
Main task of that system is to track visitors and show how much they must pay.
该系统的主要任务是跟踪游客和展示他们必须支付多少。
Main task of that system is to track visitors and show how much they must pay.
该系统的主要任务是跟踪游客和展示他们必须支付多少。
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