So this project was, let's see if we can detect any alpha particles by making a detector that swings around.

当你是本科生的时候，你们的导师会派一些,你们看上去很傻的工作,给你们干，现在这个工作就是。

麻省理工公开课 - 化学原理课程节选

But a metal detector can't detect the kind of explosives that were sewn into his clothes.

WHITEHOUSE: Security Review on Attempted Terrorist Attack

And if, on top of the bright pulse, a smaller pulse of just the right type is sent, the detector can be forced to record a one or a zero.

ECONOMIST: Secure cryptography is only as safe as its weakest link

The harder part will be designing a detector that can distinguish between two adjacent letters on a DNA strand, which are half a nanometer apart, a small fraction of the wavelength of light.

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