那眼下为何人们对石油美元再循环的担心如此之少？
不管你是不是喜欢，愿不愿意接受，死亡都是生命循环中最自然最必不可少的一部分。
Welcome or not, dying is a natural part of the circle of life.
如前所述，按顺序的输入对于合并扫描联接是必不可少的，但其无需嵌套循环联接。
As previously stated, ordered input is essential to a merge scan join, but it is not required for nested loop joins.
我们知道，这样的板块活动对生命形成来说必不可少，它不仅有助于产生复杂化学过程，而且促使物质循环，比如释放二氧化碳进入大气层，使得地球保持温暖。
Such activity is essential to life as we know it, because it helps enable complex chemistry and recycles substances like carbon dioxide into the atmosphere, which keeps Earth warm.
当今的加工者希望机器运转快速，加少回料，把生产循环周期控制在几个小时。
Processors today want to run faster, minimize scrap, and do short production runs that may only last a few hours.
研发能力和制造能力强但营销能力弱的产业，往往会陷入投入多收益少的“产业恶性循环”之中。
An industry with strong developing and manufacturing but weak marketing is bound to be trapped in a vicious circle.
该体系由两种常见的无机盐组成，吸收反应简单，脱硫效率高（90％以上），副反应少，可用空气氧化再生，循环使用。
That system is composed of two kinds of common inorganic salts, which has high desulfurization efficiency (more than 90%), fewer by-reactions, and can be oxidative regenerated by air for circulation.
土壤碳循环模型是定量实现土壤碳循环的模拟和预测的必不可少的手段，同时也是综合不同因子及其相互作用的有力工具。
The model of soil carbon cycling is important in carrying out simulating and predicting soil carbon cycling and is a effect tool synthesizing different factors and their interactions.
在由盐腌皮制备软革的过程中，以少铬鞣过程为依据，我们对铬鞣废液的循环及重新使用以制备蓝湿皮的效果进行了检验。
The effects of the recycling and reuse of chrome tannins effluent, based on the saved chrome tanning process, were examined for the preparation of wet blue in making soft type leather from steer hide.
提示灯盏细辛有改善肾脏微循环，降低血脂，降低蛋白及保护肾功能的作用，且副作用少。
The result indicated the fleabane injection can improve the microcirculation of kidney, decrease blood fat and protein, protect kidney function and low side-effect.
在其电流、转子少的状态，在循环里面，保护叶片外壳充满紫外线稳定的聚碳酸酯(如下图所示)。
In its current, rotor-less state, the inside of the circular, protective blade housing is filled with UV-stabilized polycarbonate (as pictured below).
该模型学习速率快，训练步骤少，逼近程度高，最大偏差不大于5％，为三相循环流化床蒸发器的传热计算提供了可靠的方法和理论基础；
Rapid learning speed, few training steps and high fidelity are advantages of the model. The maximal deviation is no more than 5%.
旅游业消耗低、污染少、可循环，是典型的绿色产业。
Tourism is a typically green industry, one that consumes less energy, produces less pollution and makes circular development possible.
就业少意味着有更少的人有钱来买商品，而没有人购买商品，也就意味着对工业产品的需不求不足，这样就产生恶性循环。
Fewer workers meant fewer people with money to buy goods. And fewer people buying goods meant less need for factories to produce. So it went.
应用实践表明，不停车清洗预膜方案及技术有助于循环水系统的长周期高效运行，也是循环水系统正常运行必不可少的环节之一。
The implement efficiency is analyzed and evaluated. Many practical evidences show that this technology is good for running the projects efficiently in a long period.
应用实践表明，不停车清洗预膜方案及技术有助于循环水系统的长周期高效运行，也是循环水系统正常运行必不可少的环节之一。
The implement efficiency is analyzed and evaluated. Many practical evidences show that this technology is good for running the projects efficiently in a long period.
应用推荐