"节约粮食反对浪费" 用英语可以说作 "conserve food and oppose waste"。
这个说法源自英语中 "conserve" 和 "oppose" 这两个词。 "Conserve" 指在使用资源时节约管理，而 "oppose" 指反对某事。
一些例句可以是：
Let's conserve food by only cooking what we can eat. (让我们节约粮食，只做能吃完的量。)
We must oppose food waste and make sure that every meal is finished. (我们必须反对浪费粮食，确保每餐都吃完。)
Conserving food helps to ensure that everyone has enough to eat. (节约粮食有助于确保每个人都有足够的食物。)