"Save food" 或 "conserve food" 可以用来表示节约粮食的意思。这两个词都是来源于英语动词 "save" 和 "conserve"，它们的基本意思都是"保存，保留，节省"。

下面是一些英文例句及其中文翻译：

"We need to save food in order to reduce waste and help those in need." (我们需要节约粮食，以减少浪费并帮助需要帮助的人。)
"Conserving food is an important way to protect the environment and ensure that there is enough food for everyone." (节约粮食是保护环境并确保有足够食物供大家食用的重要方式。)
"There are many simple things we can do to save food at home, such as using airtight containers to store leftovers and planning our meals carefully." (有很多简单的事情可以帮助我们在家节约粮食，例如使用密封容器储存剩菜剩饭并仔细规划我们的饮食。)