extensor pollicis brevis

例句：

1. 1.The doctor examined the injured finger and found it to be extensor pollicis brevis.
   医生检查了受伤的手指，发现它只是伸直的食指。
2. 2. The patient was unable to extend his fingers due to the injury.
   由于受伤，病人无法伸展他的手指。
3. 3. The surgeon performed a minor surgery on the patient's extensor pollicis brevis.
   外科医生对患者的伸直食指进行了一次小手术。