Good power density means a shape like a peanut butter jar, easy to fill or empty; low power density is more like a wine jug with a narrow neck.
电能密度好的就像花生酱罐子口，很容易装满或倒空；电能密度差的就像窄瓶口的酒壶。
In contrast, fruit juices and dried fruits are concentrated sources of natural sugar and therefore have a high energy density - more calories - and they don't fill you up as much.
相较而言，水果汁和干制水果是富含天然糖分，因此能量密度高，卡路里高，同时也不容易让人感到饱足。
"If you fill up on those lower caloric density and higher nutrition things, you're going to feel full, but not bloated and tired, because it's a lighter fare," she said.
“你吃过了这些低热量高营养的东西，就会有饱腹感，但是你不会感到涨腹和疲劳，因为这些都是轻食品”，她说。
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