如果您是想理解为什么有时会在 every 后面加上 single 的话。 没有区别,只为强化语气罢了。 比如: I know every one of them. I know every single one of them. 或 I've been doing exercise every day for the past 3 weeks. I've been doing exercise every single day for the past 3 weeks. 意思完全一样,只不过有时说话的人想要强调一下而已。