brain trocar

例句：

1. 1.The surgeon used a brain trocar to remove the tumor.
   外科医生用脑穿针器取出了肿瘤。
2. 2.During surgery, the surgeon inserted a brain trocar into the patient's brain.
   手术期间，外科医生将脑穿针器插入病人的脑部。
3. 3. The patient was given anesthesia before the brain trocar was inserted.
   在插入脑穿针器之前，患者接受了麻醉。