Objective To evaluate the clinical effects of butorphanol preemptive analgesia on brachial plexus block with ropivacaine.目的评价布托啡诺超前镇痛对罗哌卡因臂丛阻滞效果的影响....
I've been traveling all day.我整整一天都在赶路。It's difficult to conceive of traveling to the moon.难以想象到月球旅行会是什么样子.A senior courtier said:'He is determined to get his traveling costs down.王室一位高级伺从说, 威廉 王子决心将自己的旅行成本...