run short并不是“短跑”，而是指：短缺、不够，快用完。

【例句】
But if they are too soft, their own companies may run short.
但如果心太软的话，他们自己的公司也许会出现资金短缺。

Suddenly, a week from the fatal day, Carrie realised that they were going to run short.
在那个不幸的付房租的日子前一个星期，嘉莉突然发现钱快用完了。