A wan sun came onto his face, making the black skin shine like dull metal.

淡淡的阳光照到他的脸上，使他的黑皮肤象一块没有光泽的金属一样闪亮。

youdao

Metal Polish - Mix several crushed onion slices with some water. Apply the solution to a dull metal object using a piece of cloth.

擦亮金属——将一些压碎的洋葱片和水混合，用块布蘸取溶液，擦拭暗淡的金属物品。

youdao

Light brown mahogany and dull metal ornament constructs mainframe of bar and every article among them derives from unique inspiration of designer.

酒吧浅褐色的红木和暗哑的金属饰品构架着酒吧的主体，其中每一件物品都来自酒吧设计师特有的灵感。

youdao

These early tools closely resembled the knives we use today, consisting of a piece of metal that was sharp on one end--the blade--and dull on the other--the tang.

FORBES: No. 1 The Knife