medical grade benzine

例句：

1. 1. The medical staff used this productto treat patients with chronic pain.
   医务人员使用这种产品来治疗慢性疼痛的患者。
2. 2. Thehospital has a strict policy on the useof medical grade benzine in theirfacilities.
   医院对医用级苯的使用有严格的政策。
3. 3. The new drug was tested forits effectiveness and safety before being approved foruse in medical grade benzine.
   新药在被批准用于医用级苯之前，先进行了有效性和安全性的测试。