伤口沾染了细菌。
这项研究发现，五秒钟定律有一定道理，食物同表面接触时间越长，沾染的细菌就会越多。
The research found that the five-second rule has some validity in that longer contact times resulted in transfer of more bacteria.
如果是，那么恭喜你：在这短短的时间内，你可能沾染了房间里细菌最多的地方。
If so, congratulations: you've likely just made a quick tour of the places in the room that harbor the most bacteria.
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