A：Every two days you should come here and I'll change the gauze for you.
你每过两天来这里一下，我给你换纱布。
B：OK, thank you very much.
好的，太感谢您了。
■ e very two days 是“每过两天，每隔一天”的意思。例如：She washes her hair every two days.（她每过两天洗一次头发。）
24　棉棒
cotton swab /?k?tn/ /sw?b/
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