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1. The loop invariant is a mathematical concept that describes the behavior of a system when its state changes over time.
环路不变式是一个数学概念，它描述了系统的状态随时间变化时的行为。
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2. In control theory, the loop invariant is used to determine the stability of a feedback control system.
在控制理论中，环路不变式用于确定反馈控制系统的稳定性。
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3. The loop invariant is crucial for the design of feedback control systems, as it helps to ensurethat the system remains stable and robust under various operating conditions.
环路不变式对于反馈控制系统的设计至关重要，因为它有助于确保系统在各种操作条件下保持稳定和健壮。