科学家们指出，快餐店不仅要降低食品的能量密度，而且要缩小食品的体积。
Fast food outlets should reduce the energy density of their menus as well as their portion sizes, the scientists said.
锂电池具有体积小、能量密度高、无记忆效应、循环寿命高、高电压电池和自放电率低等优点。
Li battery have the good features of small size, high power density, no memory effect, long cycle life, high voltage and low self-discharge.
科学家们指出，快餐店不仅要降低食品的能量密度，而且要缩小食品的体积。
Fast food outlets 7 should reduce the energy density of their menus as well as their portion sizes, the scientists said.
实验室水平的吸附式天然气（ANG）储气只需用CNG约1/6的压力即可达到其3/4的体积能量存储密度。
The volumetric storage density of ANG can be 3/4 of CNG at 1/6 the gas pressure in laboratory research.
这批电动大巴车是北京首次在公交车中运用先进的锂离子电池，其主要优点在于体积小的同时拥有更高的能量密度，并且具有较长的循环使用寿命。
These electric buses are the first in Beijing to use an advanced lithium ion electric battery, which enjoy a higher energy density, comparatively smaller cubage and longer span for repetitive use.
该技术的阿基里斯的脚跟似乎是它的低能量密度，或可以存储在电池每单位体积的能量量。
The Achilles' heel of the technology appears to be its low energy density, or amount of energy that can be stored inside the battery per unit volume.
该技术的阿基里斯的脚跟似乎是它的低能量密度，或可以存储在电池每单位体积的能量量。
The Achilles' heel of the technology appears to be its low energy density, or amount of energy that can be stored inside the battery per unit volume.
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