swab down擦洗
buccal swab一种叫腮抹试;一种称为口腔黏膜测试
beam swab梁式抽油装置
Throat swab咽拭子;喉拭子
floor swab起模用毛笔
swab hitch测锤结
leadcheck swab铅检测笔
Slickline Swab抽吸
swab valve抽汲闸门
N-COUNT（可数名词） A swab is a small piece of cotton used by a doctor or nurse for cleaning a wound or putting a substance on it. 棉签
"Okay," he replied and winced as she dabbed the cotton swab over the gash.
当她用棉签轻擦他的伤口时，他应了一声“行了”，还躲了一下。