They're the universe's woodchippers: shredding entire stars into pulp, and leaving only a whiff of radiation.

它们是宇宙的削木机：将整颗恒星粉碎成纸浆，只留下一丝辐射。

Like, if you have a piano, and you throw it in a woodchipper, you've increased the entropy of the piano.

就像，如果你有一架钢琴， 你把它扔进了伐木机，你就增加了钢琴的熵。

But you can't load your pile of piano splinters into the woodchipper, and run the thing backwards to get a piano again.

但是你不能把一堆钢琴碎片装进伐木机，然后把它倒过来再弄一架钢琴。