Due to DC arc extinguishing current has no natural zero-crossing point, so, DC arc can only been extinguished by forced zero-crossing-over.
由于直流熄弧电流不存在自然的过零点，因此必须强制过零才能熄灭直流电弧。
This means that it is neither sugar, nor a purely artificial sweetener, but is instead what Cargill calls a "natural" zero-calorie sweetener.
这就意味着，该产品既非糖类，亦非纯粹的人造甜味剂，而是嘉吉公司所说的“天然”无卡甜味剂。
The price of natural gas will never go down to zero.
天然气的价格永远也不会降到零。
On top of that there's no unpleasant side effects, it's all natural, organic, no pesticides, no preservatives and it's naturally sweet but has zero calories.
不仅如此，这一处方没有烦人的副作用，它绝对是天然的有机处方，不含杀虫剂和防腐剂，而且口感自然香甜，不含热量。
Natural, zero chemical is our consistent pursuit!
纯天然，零化学是我们一贯的追求！
As you can see, the unemployment rate will never be near to zero and it also fluctuates around its average natural rate.
如图你可以看到，失业率将永远不会接近零，徘徊在它的平均自然增长率水平。
WHAT THIS is not: not just another sleep app with static white noise and fake natural sounds that has ZERO effect on your brain's sleep centers.
这是什么不：不只是静态的白噪声，并且对你的大脑的睡眠中心零影响假自然的声音又睡应用程序。
Considering the natural infestation rate and thousand kernel weight reduction, the yield losses of the tested varieties ranged from zero to 10 56%.
综合考虑不同品种的自然受害率和受害后千粒重的下降，各品种的总体产量损失率在0 ~10 - 56 %。
What we define as zero is the enthalpy of every element in its natural state at room temperature and ambient pressure.
我们将零点定义为每种元素，在室温和正常大气压下，在其自然状态下的焓。
In the natural and fluent English, the zero stress is more common than the other two, but the zero stress of the content words is often overlooked.
实义词的零重音常常被忽略，这是很多英语学习者难以说一口地道英语的原因之一。
Ball valve fully open, the flow resistance is very small, almost zero, so the ball valve diameter is widely used in petroleum and natural gas pipelines because the pipeline cleaning easy.
球阀在完全开启时，流阻很小，几乎等于零，因此等径球阀广泛应用于石油天然气管线中，因为容易清扫管线。
In addition, line mode and zero-mode voltage wave cross each other at the point of fault which causes the natural frequency "aliasing".
此外，故障电压行波于非对称短路点发生线模与零模行波相互交叉透射，致使故障电压自然频率“混叠”。
For the natural gas concentrations found, only a catalytic combustion process can achieve 'near zero' pollutant emissions.
对于所测天然气，此催化燃烧过程可达到近零污染排放。
One experimental clean-energy car runs on natural gas. Another USES ethanol distilled from corn. A third has a zero-emissions electric motor powered by a hydrogen fuel cell.
一辆尚处于实验阶段的清洁能源汽车依靠天然气行驶。另一辆使用从谷物蒸馏而来的酒精。第三辆则装有由氢燃料电池提供能量的零排放发动机。
When circumjacent load makes the lowest natural frequency zero, critical load is obtained.
当周边面力使夹层圆板的最低固有频率为零时，就可获得临界载荷的值。
When circumjacent load makes the lowest natural frequency zero, critical load is obtained.
当周边面力使夹层圆板的最低固有频率为零时，就可获得临界载荷的值。
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