This is normally done to preserve its natural colour.

这是通常的作法来保持自然的颜色。

Improve surface gloss, beautification and restore natural colour.

提高物体表面光泽、美化及恢复自然色彩。

All traditional designs are also suitable for natural colour woolen carpets.

天然色地毛也适合于各种传统的地毯图案。

Jute Hessian Cloth can be supplied in natural colour or in any colour of your choice.

我们可以供应原色粗麻布，也可以根据您的需求进行染色处理。

Even today wise old women are convinced that regular oiling maintains the natural colour of the hair and prevents greying.

即使在今天，英明的老年妇女也坚信经常抹油能保持头发的自然颜色，防止灰白。