Definition of かふん
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(n) pollen
花粉よりも小さな黄砂をマスクでどれだけ防ぐことが出来るのか?花粉よりもずっと厄介者のように思います。
Just how well can masks block the, even smaller than pollen, yellow sand dust? I think it much more of a nuisance than pollen.