fuel ring

例句：

1. 1. The engine needs to be checked for any fuel ring issues.
   发动机需要检查是否有燃料环问题。
2. 2. The car's engine has a fuel ring that can cause problems if not properly maintained.
   汽车的发动机有一个燃料环，如果不妥善维护，可能会导致问题。
3. 3. The technician found a small fuel ring on the exhaust pipe, which could have caused the engine to overheat.
   技术人员在排气管上发现了一个小的燃料环，这可能导致发动机过热。