然而

However, the methods and practices of operations research were being applied just prior to the war by British scientists working for the Air Ministry.

然而，早在二战之前，英国的科学家就将运筹学的理论和实践应用于空军。

As one of the common facilities in manufacturing enterprises, air compressors are widely used due to their capacity of producing compressed air. However , an authoritative survey shows that air compressor system consumes about 86%of the total energy cost within five years compared with purchase price that only accounts for 8% of total cost. This high volume of energy consummation invisibly increases enterprises' operational cost. However ,within the 90% of the cost for energy, main tenance and repair , 50% can be saved.

压缩机作为制造厂最常用的设备之一，其所产生的廉价适用的压缩空气能源备受许多企业家青睐，据权威机构调查，空气压缩系统在五年的总成本中，运转能源消耗费用占约86％，压缩系统初期购置费用仅占总成本的约8％，其高额的运转能源费用无形中增加了企业运营成本；然而人们却不知道这里占近90％的能源及保养修理费用却是有50％以上是可能不必支付的。

However, the air tank commonly worn on scuba divers back, is attached to a specially designed raft floating on the surface of the water.

然而，常见的空气罐上佩戴潜水员回来，是附属于一个专门设计的木筏漂浮在水面。

However, such bombs might very well prove to be too heavy for transportation by air.

然而，这些炸弹可能非常好的证明对于用飞机来运是非常重的。

However, this same reason means they tend to trap air pollutants as well.

然而，这意味着他们同样的原因往往陷阱空气污染物以及。

But in fact, the system of half-tracked air-cushion vehicle is over complicated. When the vehicle drives in an unknown soil, the parameters and structures of controlled member will change with load or disturbances. This system is nonlinear and time-variant, and it is very difficult to analyze its transfer function and state function quantitatively.

然而在实际工作中，由于本课题中的系统过于复杂，当行驶在未知土壤条件下时，被控对象往往随着载荷或干扰因素影响，其特性参数或结构发生改变，属于非线性和时变性的不确定系统，它的传递函数或状态方程难于用传统的定量分析方法加以实现。

But instead of injecting compressed air into the combustion chamber, Dr Zhao's design would use the compressed-air tank to replace the electrically powered compressors that feed air-driven starter motors.

然而，赵博士的设计不是往燃烧室里注入压缩空气，而是用压缩气缸代替电动的、为发动机提供空气动力的空压机。

However, the focus of the light on the solar cell can also be fine-tuned by changing the air-pressure within the balloon, and thus the curvature of the mirror.

然而，通过改变气球内部的气压，可以对照射在太阳能电池上的光线焦点进行微调，因此也可以改变镜面的曲率。

However, in this writer appears, Kowloon airborne luxury at this time in Shanghai is not without reason.

然而，在笔者看来，九龙空中豪华在这个时候在上海是不是没有理由。

Almost immediately the airdrop was detected and engaged.

然而空降的部队几乎立即就被伊军发现并与之交火。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。