' He pulled a blade of grass through his teeth.

’他从牙齿里拔出一片草叶。

When I pull my blade, your friend starts bleeding.

我一拔刀 你的朋友就会流血。

He stretched out a hand and pulled the sharp blade from the elf's body, then dragged off his own jacket and covered Dobby in it like a blanket.

伸出手把他身上那锋利的小刀拔了出来。接着他脱了自己的夹克，像盖毯子一样把它盖在多比身上。