“days are numbered”别理解成“日子被数算”，真实含义是…的时日不多；…将不久于人世；要完蛋了；寿命不长，

【例句】
If news of this gets out to the public, your days as a senator are numbered!
如果这样的消息公之于众，你做参议员的日子也不多了。

The captain of the wrestling team found out that I kissed his girlfriend, so my days are numbered now!
摔跤队的队长发现我亲了他女朋友，所以我要完蛋了。