铁路信号中的可编程电子系统（PES）是一种安全相关系统。 这类系统更注重失效-安全，而不仅仅是可靠性或可用性。

Programmable electronic system (PES) used in railway signaling is a safety related system, which lays more stress on the ability of fail safe, not merely on the reliability or availability.

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相反，他把这一案例描述成“健康和安全措施的完全失效”的一个例子。

Instead he describes the case as an example of a "total failure in health and safety procedures".

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任何有能力的黑客都可以在每次访问表单时伪装其IP地址，因此能够非常容易地让简单的安全检查失效。

Any competent hackers can spoof their IP address every time they visit the form, so they can easily subvert that simple security check.

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