Low energy density means there are few calories in a lot of food.

而低能量密度意味着食物量虽大卡路里含量却很低。

youdao

Grapes have a low energy density - 1 cup of grapes has about 104 calories.

葡萄的能量密度低，一杯葡萄含大约104卡路里。

youdao

Coal from this region is low in sulphur, and so burns more cleanly, but has a relatively low energy density unless treated.

该区域的煤含硫量低，也因此更为清洁，但是在处理前能值(energy density)相对较低。

youdao

One main problem is that the electrode package, also called the stack, has very low energy density.

FORBES

Our ability to store electricity in batteries is improving, but current low energy density makes batteries an inefficient choice for large-scale storage.

WHITEHOUSE: Engage and Connect

And the low energy density of biomass--corn, switchgrass, wood, etc.

FORBES: Magazine Article