Definition: Rusty metal has rust on its surface. Level: B2
那辆旧自行车有一条生锈的链条。
The old bicycle had a ___rusty chain.
在雨中多年后，铁门变得完全生锈了。
After years in the rain, the iron gate became completely ___rusty.
你得小心那把生锈的旧工具；它可能会断裂。
You need to be careful with that ___rusty old tool; it might break.
