英语语法分析

So, is hydroponics a cheaper way of producing food?

所以，无土栽培可以更廉价生产食物？

《柯林斯英汉双解大词典》

They all wanted to learn how to grow vegetables in this way of indoor gardening called hydroponics.

他们都想学习如何用这种被称为水培法的室内园艺方式种植蔬菜。

Hydroponics is not planting them in pure water, in water that has the proper mix of nutrients.

水培法不是把它们种植在纯净水里，而是在适当混合了营养素的水中。