在有袜子的情形下，清洁工作花费了稍长点的时间，差不多25秒左右，“现在它还不能透过鞋起作用，”Morfill补充说。

The cleaning takes a bit longer when socks are added to the job, he said — about 25 seconds. “And it doesn’t yet work through shoes, ” he added.

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过了8点，他停了停，透过窗户望望天空，见到隔壁屋脊上有两只闷闷不乐的秃鹰，正在太阳底下晒干身上的毛。

After eight he stopped for a while to look at the sky through the window, and he saw two pensive buzzards who were drying themselves in the sun on the ridgepole of the house next door.

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通常，这些转折点是透过事后诸葛才可清楚诠释。

Often, these points are best understood later, through the clear lense of hindsight.

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