They must find the right combination of soil mix, water content and drying methods.

VOA: special.2009.01.12

The word "carbohydrate," as you might imagine, if you ever thought to break it down means the combination of carbon and water.

碳水化合物这个词,如你所想,如果你把它进行拆分的话,就是碳和水的结合物

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选