refined grain

基本解释

Limit your intake of sugary foods, refined-grain products such as white bread, and salty snack foods.
限制您的含糖食品、精制的谷类食品的摄入，比如白面包，和咸味小吃。
Eating whole grains (versus refined-grain or white bread) has been linked to lower risks of cancer and heart disease.
全麦面包有助于减低得癌症及心脏病的危险。
There are likely multiple factors at play, but the most notable is this: Whole grain foods pack in more fiber and an overall stronger nutritional package than their refined-grain counterparts.
这里有多种因素在起作用，而其中最为主要的是：全麦食品相较于粗粮含有更多的纤维成分。