How many bacteria actually transfer in five seconds?

到底在五秒之内转移了多少细菌呢？

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But how many bacteria actually transfer in five seconds?

但是有多少细菌能在五秒钟内转移呢？

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It depends on just how many bacteria can make it from floor to food in a few seconds and just how dirty the floor is.

这取决于有多少细菌能在数秒内从地上转移到食物上以及地有多脏。

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You've probably seen agar plates, if you smear a solution that's contaminated with bacteria on it, then that bacteria will grow on this agar rich medium and you'll get many, many copies of the bacteria that you've smeared at low density onto the plate.

你们大概见过琼脂培养基,如果将有细菌的溶液涂抹在培养基上,细菌就会在富含琼脂的培养基上生长,你会得到许多许多细菌,即使你只涂抹了低浓度溶液

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