Idiom: "(let’s) face it"  

Definition:

accept the reality of the situation

Examples:

1) Let’s face it, you’re not that smart so you’re not going to get into Stanford.

2) Let’s face it, if you hadn’t been late today, you wouldn’t have been fired.

中文解釋：http://www.youzienglish.com/main/idiom_of_the_day/104/cn/