swab
[swɑ:b]
n.
（医用的）拭子，药签;
（用拭子取下的）化验标准;
vt.
用拭子拭抹或擦净（某物）;
（用拖把、抹布等）擦洗（某物）;
例句:
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to take a throat swab
用棉签从咽部采集化验样品
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Yet I kind of think I've - yes, I've seen the swab.
不过,我好像记起来了 —— 是的, 我见过这狗东西.
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Administer the salve to the sunburned area with a cotton swab.
请用棉药签把药膏敷在晒伤的地方.
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Procedure Pick up the dampened cotton swab.
来自SA
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Such samples can be obtained using a cotton swab inside the mouth.
来自NPR
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Participants will use a sample kit with a q-tip to swab surface areas.
来自SA