单数部落　一根棉棒 a cotton swab
一盒棉棒 a box of cotton swabs
复数部落　两根棉棒 two cotton swabs
两盒棉棒 two boxes of cotton swabs
cotton /?k?tn; ?kɑ?tn/ n. 棉花；棉线
swab /sw?b; swɑ?b/ n. 药签；拖把 v. 拭抹；擦洗
会话急救包
转动棉棒 rotate a cotton swab
A：Rotate the cotton swab more gently. You hurt me!
转动棉棒时再轻一点。你弄疼我了！
B：Sorry. I got it.
对不起。我知道了。
rotate /r???te?t; ?ro?te?t/ v. 转动；旋转