...感到日子过得太快就用（Time flies）时光飞逝表示；即使在年老临终时，他们也会说是靠借来的时间活着的（Live on borrowed time）。
双语例句
1
In the mid 1980s our world first overshot its capacity to provide for its human population, yet this population continues to grow and we continue to liveonborrowedtime.