groan

例句：

1. 1. The patient groaned in pain as the doctor worked on him.
   病人在医生给他做手术时呻吟着。
2. 2.She grumbled about the long commute every morning.
   她每天早上抱怨通勤时间太长。
3. 3.The old man groaned with exhaustion as he sat down.
   老人坐了下来，疲惫地呻吟。