But a generator goes a bit further than a closure: a generator also "remembers" its position within flow-control constructs (which, in imperative programming, is something more than just data values).

但生成器比“终止”要更进一步：生成器还“记住”了它在流控制构造(在命令式编程中，这种构造不只是数据值)中的位置。

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Swing-type check off er the least pressure drop and offer simple automatic closure; when fluid flow stops gravity and flow reversal closes valve.

旋启式止回阀压降最小，能够完全自动关闭，即在介质流动停止、重力和介质倒流的状态下自动关闭阀门。

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However, the management committee said the closure was due to software and hardware problems due to the mass flow of visitors.

然而，管理委员会称停运是为了解决因游客众多而带来的各种软硬件方面的问题。

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The company said the closure was necessitated by weak volcanic rock above the ore deposit which allowed water to flow into the mine.

FORBES: The perils of mining