这个文件夹包含大约2gb的数据，所以我料想会扫描比较快……几乎瞬间完成，看到如下所示。
This was a folder that contains around 2gb of data so I figured it would be done much quicker... it was almost instant and this is what I saw.
专家说，这次爆发与上次根本不是一个级别的，火山灰颗粒比较大，所以降落的也比较快。
Experts say this eruption is on a different scale to the one last year and ash particles are larger and, as a result, fall to the ground more quickly.
所以坐地铁一般来说是一个比较快速的出行方式。
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