rust

• 指铁或钢在氧化作用下，尤其在潮湿环境中表面形成的红棕色锈层；也指由锈菌引起的植物病害。

A noun referring to a reddish-brown coating formed on iron or steel by oxidation, especially in the presence of moisture, or a plant disease caused by rust fungi.

不可数

1. Oxidation on metalA2formal

   A reddish-brown coating that forms on iron or steel when exposed to air and moisture.

   铁锈

   • The old gate was covered in rust.
   • Rust can weaken metal structures over time.
   • He used sandpaper to remove the rust from the bicycle chain.

   同义词corrosionoxidationscaletarnish

2. Plant diseaseB2formalscientific

   A fungal disease that affects plants, causing reddish-brown spots.

   锈病

   • The wheat crop was damaged by rust this season.
   • Rust appears as orange or brown pustules on leaves.
   • Farmers use fungicides to control rust in their fields.

• 动词，指铁或钢在潮湿空气作用下表面形成红棕色氧化层的过程，也指因闲置或疏于照料而逐渐损坏、变质。

A verb used to indicate the process of forming a reddish-brown oxide coating on iron or steel due to exposure to moisture and air, or to deteriorate or become impaired through lack of use or neglect.

1. Form rustB1formal

   To become covered with a reddish-brown layer of iron oxide due to exposure to moisture and air.

   生锈

   • The old gate began to rust after years of rain.
   • If you leave the tools outside, they will rust quickly.
   • The metal pipes rusted because of the humidity.

   同义词corrodetarnish

2. Deteriorate or declineB2informal

   To become less effective or skilled due to lack of use or practice.

   荒废

   • His French has rusted since he stopped practicing.
   • My programming skills have rusted over the years.
   • Don't let your talents rust away.

   同义词atrophydecaydeclinedeteriorateerodelanguishstagnatewither

   反义词honeimprovepolishrefinesharpen