Grain is too precious to waste.

粮食十分珍贵，不可浪费。

youdao

We mustn't waste a drop of water or a grain of rice.

一滴水一粒米我们都不应当浪费。

youdao

Don't waste a grain of rice.

不要浪费一粒米饭。

youdao

Don't waste a grain of rice.

不要浪费一粒米饭。

youdao