somnolency

例句：

1. 1. He fell into a deep sleep after the long flight.
   长途飞行后，他陷入了深深的睡眠。
2. 2. She was so sleepy that she couldn't keep her eyes open.
   她太困了，睁不开眼。
3. 3.The patient needed to be kept in a somnolent state for surgery.
   病人需要保持昏睡状态以便进行手术。