goldbeater's skin

例句：

1. 1.The goldbeater's skin is a rare and valuable material.
   金打手的皮肤是一种稀有且有价值的材料。
2. 2. The old man's gnarled hands had worn the goldbeater's skin away.
   那位老人的粗糙双手已经磨去了金打手的皮肤。
3. 3. The goldbeater's skin was used to make jewelry in ancient times.
   古代，金打手的皮肤被用来制作珠宝。