他是个火车迷，能说出每辆蒸汽机车的型号和年代。

He's a real train ___buff who can identify every steam locomotive model and era.

这双靴子是用柔软的牛皮制成的。

These boots are made of soft ___buff leather.

她买了一条浅黄色的围巾。

She bought a scarf in a soft ___buff color.