The sands are running out, we must have the money by tomorrow.

剩下的时间不多了，我们明天得弄到这笔钱。

The sands of time are running out for the central star of this hourglass-shaped planetary nebula.

在这一酷似沙漏形状的星云内，“时间之沙”即将从中央星之中流逝殆尽。

The sands of his life are fast running out.

他的生命很快将走到尽头。