swab
/swɔb; swɑb/ n
(a) piece of cotton wool, etc used in medicine for cleaning wounds, etc or for taking specimens, eg of mucus, for testing （医用的）拭子; 药签.
(b) specimen taken in this way （用拭子取下的）化验标本
take swabs from children suspected of having diphtheria 取怀疑白喉患儿拭样供化验. swab, v (-bb-)
1 [Tn, Tn.pr]
clean or wipe (sth) with a swab 用拭子拭抹或擦净（某物）
swab the wound with cotton wool 用药棉擦净伤口
swab the blood off her face 用拭子揩掉她脸上的血迹.
2 [Tn, Tn.p] ~ sth (down) clean sth with water using a mop, cloth, etc （用拖把、 抹布等）擦洗（某物）
swab down the decks 用拖把擦洗甲板.