And so, what's the net energy?
因此，什么是净能量呢？
The net energy is the sum of the repulsive and the attractive.
净能量是排斥能，和引力能的总和。
Zero Net Energy Buildings: Are they Economically Feasible?
零能源建筑：是否在经济上可行？
One is the life-cycle primary energy balance, or how much net energy the facility would provide over its lifetime.
其中一个能量指标就是生命周期的主要能量余额，或者说是设备将会在使用期内提供多少净能量。
Furthermore, ethanol requires a tremendous amount of fossil fuels to produce. The net energy gain is not terribly high.
此外乙醇的制造得耗用大量石化燃料，两相抵扣之后、我们最后得到的干净能源量其实并没那么高。
The net energy flux of the guided waves related to these surface polaritons may be forward, backward or even be stopped.
负折射手征介质平板的表面波能流可以向前或者向后，甚至可以停止。
The method of net energy analysis for fuel ethanol from corn was developed based on principles of life cycle inventory(LCI) analysis.
基于生命周期清单分析原理，建立了玉米燃料乙醇的净能量分析方法。
Many unanswered questions lie not just in the technology, but in the area of life-cycle impact-in particular, its net energy balance.
许多悬而未决的问题不仅局限于技术层面，还有其领域中生命周期的影响，特别是净能量平衡。
An optimization model on life cycle net energy cost related to renewability of cassava-based ethanol blended gasoline fuels was given in this paper.
建立了木薯-汽油混合燃料考虑可再生性的生命周期净能源成本优化模型，并对木薯乙醇-汽油混合燃料考虑可再生性的生命周期净能源成本指标进行了优化。
Moreover, two of the world's largest emerging economies - China and India - are net energy importers, and their economies should benefit from low prices.
此外，世界上规模最大的两个新兴经济体——中国和印度——都是能源净进口国，低价格应该对他们的经济有好处。
Therefore, net energy system can be used in formulated diets for laying hens to reduce in dietary energy levels, and better improve the economic benefits.
因此，在配制蛋鸡日粮时，可考虑采用净能标准以期降低日粮能量水平，获得更大的经济效益。
Armenia is now a net energy exporter, although it does not have sufficient generating capacity to replace Metsamor, which is under international pressure to close.
虽然其缺乏足够的生产能力来取代在外国压力下关闭的Metsamor，亚美尼亚现在仍然是个能源净出口国。
Energy efficiency (net energy gain or energy ratio) of corn-based ethanol as a substitute for fossil fuel is an important criteria for assessing its sustainability.
玉米燃料乙醇作为化石燃料的替代品，能量效率(净能量或能量比)是评价其可持续性的一个重要标准。
By the continuous-feeding external-heating rotary kiln, the experimental studies on the gas yield characteristics, mass balance and net energy income of the polyethylene pyrolysis were performed.
在连续给料外热式回转窑试验台上，以聚乙烯为试验物料进行了热解产气特性、质量平衡以及能量净收益的试验研究。
The axes are comprised of a generalized homologous temperature, the normalized kinetic energy flux, and the net film thickness.
坐标轴包括广义同系温度，标量化动能以及净膜厚度。
About 74% of the country's electricity comes from nuclear sources and it is the world's largest net exporter of nuclear energy.
法国74%的电力来自于核力发电，它还是世界上最大的核能源净出口国。
Denmark is a net exporter of food and energy and has a comfortable balance of payments surplus.
丹麦是食品和能源的净出口国，有稳定的收支平衡。
Such a problem can also provide solutions; at the very least, energy researchers looking to make improvements on net carbon dioxide emissions have a clear picture of their point of attack.
这样的问题也提供解决方案；至少，能源研究者在寻找净碳排量的进步上有清楚的攻击点。
Describing the Hopfield net in terms of energy has an interesting and important consequence.
以能量的方式来描述Hopfield网络有着有趣而且重要的意义。
At the very least, energy researchers looking to make improvements on net carbon dioxide emissions have a clear picture of their point of attack.
至少，能源研究者在寻找净碳排量的进步上有清楚的攻击点。
With more than 1.5 billion people online around the world, scientists estimate that the energy footprint of the net is growing by more than 10% each year.
全球网民超过15亿人，科学家推测互联网的能源消耗正以每年10%的速度递增。
The net result is that each successive meeting gets less effective as energy wanes.
其结果就是，随着能量的衰减，会议的效率就越来越低。
We intend to devote all our time and energy to protecting the fundamental civil liberties on the net and elsewhere.
我们将全力以赴保护人们在网络以及其他地方的公民自由权。
The bright minds at the University of Maryland created the WaterShed, an impressive one bedroom home that goes beyond net zero energy.
令人难忘的一居室，零能耗的分水岭小屋是马里兰大学集体智慧的结晶。
Momentum is conserved, because there was no net external force, so now kinetic energy is also conserved.
动量是守恒的，因为它不受外力，因此动能也是守恒的。
Because the energy load is so greatly reduced, a series of solar panel arrays will allow them to realize net-zero energy consumption.
由于能源负载大大降低，一系列太阳能电池板将使它们能够实现纯零能耗。
The momentum of the individual particles gets changed, but the net momentum did not change but the kinetic energy was destroyed.
单个粒子的动量,会发生改变，但是总动量不变,而动能被损耗。
Kinetic energy can be destroyed, but momentum cannot be destroyed in the absence of a net external force on the system as a whole.
动能可以被毁，但是动量不能，在整个系统外力，不存在情况下。
Kinetic energy can be destroyed, but momentum cannot be destroyed in the absence of a net external force on the system as a whole.
动能可以被毁，但是动量不能，在整个系统外力，不存在情况下。
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