crotaline

例句：

1. 1. The old car had a lot of rust on the dashboard.
   这辆旧车仪表盘上有很多铁锈。
2. 2. The rust spots on the metal fence are unsightly.
   金属围栏上的锈迹很显眼。
3. 3. The rusted metal door was difficult to open.
   生锈的金属门很难打开。