refined grain

基本解釋

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、精制的谷類食品的攝入，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.
全麥面包有助于減低得癌癥及心臟病的危險。
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.
這里有多種因素在起作用，而其中最為主要的是：全麥食品相較于粗糧含有更多的纖維成分。