In order to obtain rust, brown, gun-black and ancient green films on brass at room temperature, the chemical coloring process on brass in acid solution was studied.

为了在黄铜基材上室温下获得铁锈色、棕色、枪黑色、仿古绿色膜层，研究了黄铜酸性化学着色工艺。

youdao

Stem rust produces reddish-brown spots on the stems of infected plants.

VOA: special.2009.08.18

Rust-brown tiled rooftops, church spires and onion domes: its skyline is a credit to Swiss understatement.

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Upstairs, designer David Mitchell created a serene guest-bedroom color scheme of olive green, rust, chocolate brown and khaki.

FORBES: The 2005 Investment Guide

The rounded bodywork now russet-brown with rust, it was supposedly the getaway car of diamond thieves, shot long ago by police.

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