rust

/rəst/

a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture

中文释义：铁锈；锈

The old iron gate was covered with rust after years of rain.

多年的雨水使旧铁门上布满了铁锈。

Regular painting can prevent rust from forming on metal surfaces.

定期涂漆可以防止金属表面生锈。