... 调整限制区域 Limited Region 受限制区域 restricted area 任意形成的限制区域 Arbitraryly formed restriction areas ...
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模型还引入了约束条件作用和随机因素，前者判断受限制区域，后者增强模拟的真实性。
Restrictions and random facts are also imported, the former restricts the area and the latter makes the whole simulation process more authentic.
对于没有持续性记录的活动来说，实地观察法是一种非常有效的方法。持续的观察可以发现是否有不正确进入受限制区域的行为。
Observation is particularly important where there is no permanent record of activities –discrete observation can reveal whether there is improper access to a restricted area.
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