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Curled up on the windowsill purring , and chasing mice

卷起窗帘咕噜叫，追赶着老鼠

The quiet motor-like sound of a purring cat is not yet well understood .

人们现在还是搞不懂猫发出那静静的、发电机一样的呜呜声是表达什么意思。

Much modern manufacturing takes place on spotless shop floors with only the lightest sprinkling of staff to monitor the purring machinery .

一尘不染的车间，零星的几个员工监测着嗡嗡作响的机器这是很多现代制造业留给我们的印象。

Seems to be purring along now , huh ?

好象一路上都有点杂音啊？

Or a purring , satisfied kitty ?

还是只娇喘着的满足了的猫咪?