单数部落　一瓶指甲油 a bottle of nail polish/nail varnish
复数部落　两瓶指甲油 two bottles of nail polish/nail varnish
polish /?p?l??/ n. 上光剂；磨光 v. 擦亮；使发亮
varnish /?vɑ?n??/ n. 指甲油
■ 注：nail polish 为美式英语的说法，nail varnish 为英式英语的说法。
会话急救包
挑选指甲油 choose nail polish
A：Can I choose a bottle of nail polish?
我可以挑选一瓶指甲油吗？
B：Certainly. There's a wide variety of colors to choose from.
可以。我们有很多种颜色可以选择。
variety /v??ra??ti/ n. 种类；品种
◆ a variety of 很多种的，各种各样的
使用指甲油 use nail polish
A：Most girls use nail polish to make hands more beautiful.