河狸、北极狐，特别是黑貂的皮毛被称作“软黄金”，俄罗斯人在其诱惑下纷至沓来。

Russians were driven by the lure of "soft gold" : the skins of beavers, Arctic foxes and above all sable.

将他的稀薄的黑貂画笔换成了猪毛的，将精细的画布换成了粗糙的；

swapped thin sable brushes for hog-hair and fine canvases for rough;