基本解释回抽,侧线循环回流同根派生 pumpback相关词英汉例句Totally 23 cases of traditional block anesthesia had pumpback blood，needing to change direction and reinject. 直接麻醉法有23例注射麻药前回抽有血，经改变方向后重新注射;pumpback reflux 侧线回流pumpback更多例句