I can say to them, " Waste not, want not" .

我可以回答他们" 俭以防匮" 。

The other common expression is: " Waste not, want not" .

另一个常见的表达是" 俭以防匮" 。

A few minutes isn't a lot of time. - Waste not, want not.

几分钟可不长哦 - 那就别浪费。

Waste not want not was likely her motto.

浪费不想要可能是她的座右铭。

I found these tied to a lamppost and I thought waste not, want not.

我看见路灯上绑着这些花，我不想浪费了。

Tuscan culinary traditions are rooted in a waste not want not philosophy, so any leftovers would be cooked in a tomato sauce the next day.

托斯卡纳饮食传统植根于一种哲学：不浪费亦不匮乏，所以到了第二天，任何剩菜都可以和西红柿一起烹饪。