在测量键释放时间（大多数是几百毫秒）时，极有可能无法匹配精确到毫秒的键释放计时。
When measuring intra-key release times, most often in the hundreds of milliseconds, it is highly unlikely to match the precise millisecond of the key release.
对密码模糊度和测量总计时的补充是击键需求之间的精度。
A complement to the obfuscation and total timing measurements is a precision between keystrokes requirement.
对人类来说这只是很小的一个数字，但是对于现代的计时技术，测量如此小的数字是易如反掌的。
That's a tiny amount for humans, but it's well within the measuring capability of modern clocks.
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