Now they do say in the paper "It is worth stressing that this measurement does not rely on the difference between a start (t0) and a stop signal but on the comparison of two event time distributions."

他们的确在论文中提到“值得注意的是这一测量并不依赖于开始(t0)与结束信号之间的时间差，而是取决于两个事件的时间分布。”

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Getting a DNT signal does not oblige anyone to stop tracking, although some companies have promised to do so.

获得 DNT 信号并不意味着任何人都必须停止跟踪，尽管一些公司已经承诺会这样做。

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With the right device tuned to the right frequency, what's to stop a thief from jamming your setup and blocking that alert signal from ever reaching the base station?

通过将正确的设备调整到正确的频率，如何防止小偷干扰你的设备阻止警报信号到达基站呢？

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In 1988, two trains collided in the Bronx after an engineer apparently ran through a red stop signal.

WSJ: Train Derailment Injures Dozens

Engineers used plastic dams in a bid to stop water getting into signal boxes at Cowley Bridge, Devon.

BBC: South West rail problems could last five days

Obama also made clear that Israel has the right to defend itself as it sees fit, which amounted to a diplomatic signal that Washington would not stop a unilateral Israeli strike at some future point if no progress occurred.

CNN: Obama, Netanyahu agree on preventing nuclear-armed Iran