再后来发现，把毛皮和某几种特定的树皮放到水中一起煮，可以让皮革变得更柔软。

Much later, it was found that boiling skins in water with bark from certain trees made the leather even softer.

youdao

再后来发现，把毛皮和某几种特定的树皮放到水中一起煮，可以让皮革变得更柔软。

Much later, it was found that boiling skins in water with bark from certain trees made the leather even softer.

youdao