基本解释廻抽,側線循環廻流同根派生 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例注射麻葯前廻抽有血，經改變方曏後重新注射;pumpback reflux 側線廻流pumpback更多例句