这些引起了严重的污染问题，因为通过分子扩散的传质比涡流扩散的要慢。
This cause serious pollution problems because mass is transferred less rapidly by molecular diffusion than by eddy diffusion.
这些引起了严重的污染问题，因为通过分子扩散的传质比涡流扩散的要慢。
This cause serious pollution problems because mass is transferred less rapidly by molecular diffusion than by eddy diffusion.
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