The treatment should be repeated every two to three hours.

　　這種治療方法應該每隔兩到三小時重復一次。

　　We're open from 8 to 7 every day.

　　我們每天從早8點至晚7點營業。

　　Every single time he calls, I'm out.

　　他每次打電話來我都不在家。

　　Be reasonable! We can't work late every night.

　　要講道理呀！我們不能每天晚上都加班到很晚呀。

　　We see each other every now and again.

　　我們偶爾相見。