A similar consideration can be used to define the density of momentum, the density of energy, and so on.
可以用类似的方法定义动量密度，能量密度等等。
They can also measure the geometry of space. That allows them to deduce the total density of energy and matter in the universe and infer the amount of dark energy.
他们还能通过测量空间几何推断出宇宙中能量和物质的总密度，并推算暗能量的总和。
Electrolyte is one of the key materials of synthesis of lithium ion battery of high density of power, high density of energy, long circular life and good capability of security.
电解质是制备高功率密度、高能量密度、长循环寿命和安全性能良好的锂离子电池的关键材料之一。
The bone density of the mandibular angle and coxofemoral region can be measured with dual-energy X-ray absorptiometer.
可以使用双能X 射线吸收仪测量下颌角和股骨区的骨密度。
As a fuel, ethanol has a lower energy density and therefore needs more of it to do the same job.
作为一种燃料，乙醇的能量密度更低，所以需要消耗更多的量来完成同样的工作。
Increasing the operating voltage will boost the energy density of the composite significantly.
增加运行电压将能显著提高这种复合材料的能量密度。
And they must solve problems with the energy density of batteries.
他们还需解决电池的能量密度问题。
Fast food outlets should reduce the energy density of their menus as well as their portion sizes, the scientists said.
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。
In a study published in the journal Obesity Reviews, they calculated the average energy density of menus at McDonald's, KFC and Burger King, using nutritional data from the fast food chains' websites.
《肥胖评论》杂志发表了他们的研究结果，他们通过快餐连锁网站上的营养数据计算了麦当劳、肯德基和汉堡王食品的平均能量密度。
The combination of materials determines the characteristics of the battery, including its energy and power density, safety, longevity and cost.
材料之间的结合决定了电池的特性，包括它的能量和功率密度，以及安全性、使用寿命和成本。
The objective of the integrated design and development activity is to further improve power density, increase energy efficiency, and to reduce manufacturing cost.
综合设计和开发活动的目标是为了进一步改善功率密度，提高能量效率并减少制造成本。
The batteries have to store a lot of energy in a small, light package, scoring high in a quality known as energy density.
新型电池必须在轻小的电池组里储存大量电能，在能量密度上表现出高评分。
The pure magnesium can then be used as a fuel (its energy density is about ten times that of hydrogen).
到那时纯镁可用作燃料(其能量密度大约是氢的十倍)。
Oil is found in relatively few places, and its energy density, pumpability and ease of use in internal-combustion engines makes it particularly well suited as a transportation fuel.
储有石油的地方相对较少，因其能量密度、泵送能力及在内燃机上的易用性使其特别适宜成为运输燃料。
The stability of the new materials suggests a way to increase energy density at the pack level, Chamberlain says.
这一新材料的稳定性提供了提高能量密度的级别，张伯伦说。
Simply put, energy density is the number of calories (energy) in a specific amount of food.
简单讲，能量密度指特定食物量中的卡路里(能量)含量。
In the early 1990s, such batteries had an energy density of about 100 watt-hours per litre.
在1990年代早期，这种电池每升的能量密度是大约10 0瓦时。
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。
But for anything much bigger, the energy density of aviation fuel still looks to be unbeatable.
但是对于任何大型的家伙，化石燃料的所拥有的能量密度看起来仍然是不可打败的。
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。
For it to be held that way, rather than getting more and more curved over time, the amount of matter and energy it contains must be at a particular, critical density.
而根据这个状态，不是随时间而越来越弯曲，它所拥有的物质与能量必须在一个临界的，特别的密度。
Without the dark energy needed to explain the acceleration, the universe would have only a quarter of the necessary density.
没有需要的暗能来解释加速度的话，宇宙就只有应有密度的四分之一。
It ranks seventh for total energy used, however this is largely the result of the state's relatively low population density, the third lowest in the country.
在总能源消耗方面排名第七，这绝大方面取决于该州作为该国人口数第三低相对人口密度。
Wind and solar generation tend to be distributed because of the low density of the natural energy they collect.
由于它们采集天然能源的地点非常分散，因此风能和太阳能的发电也呈现出分散状态。
Detection of echo energy could reveal the presence of a target and its location, size, shape, density and intensity.
检测回波能量就可获知目标物的存在、位置、大小、形状、浓度及强度。
Factors that influence energy intake include portion size, energy density and the number of meals, snacks and drinks consumed each day.
影响能量摄取的因素包括：份量大小、能量密度、用餐次数及每日消耗的小吃和饮料。
Think of a battery as a bottle for energy, and the power density as the size of the bottle’s neck.
想象电池是一个能量瓶，电能密度就是瓶颈的尺寸。
Think of a battery as a bottle for energy, and the power density as the size of the bottle's neck.
想象电池是一个能量瓶，电能密度就是瓶颈的尺寸。
Because of this flexibility, researchers hope to develop new electrode materials that can increase the energy density of lithium-ion batteries by a factor of two or more in the future.
因为具有这种弹性，研究者们期待能开发出新的电极材料，未来也许可以把锂离子电池的能量密度提高2倍或以上。
Because of this flexibility, researchers hope to develop new electrode materials that can increase the energy density of lithium-ion batteries by a factor of two or more in the future.
因为具有这种弹性，研究者们期待能开发出新的电极材料，未来也许可以把锂离子电池的能量密度提高2倍或以上。
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