头颅

例句：

1. 1. The doctorexamined the patient's head for signsof injury.
   医生检查了病人的头部以寻找受伤的迹象。
2. 2. The scientist used amicroscope to examine the microscopic structureof the molecule.
   科学家使用显微镜来观察分子的微观结构。
3. 3. Thepoliceman asked the suspectto raise his head and lookat him.
   警察要求嫌疑人抬起头看着他。