Cách sử dụng
Rust is a word that describes the reddish-brown substance that appears on metal surfaces when they become exposed to oxygen and moisture for long periods of time. It can weaken the metal and make it less effective for its intended purpose. For example, if a metal fence is allowed to rust for too long, it may become weak and break easily. Rust can also be used as a verb to describe the process of metal becoming covered in this reddish-brown substance. Additionally, rust can be used metaphorically to describe something that is deteriorating or deteriorating in quality over time.