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But to achieve such a request, designers need to spend 5 years or longer to test, difficult to match graduates.

也有很多是从美术，计算机，建筑和其他行业的切换不到两年的占百分之科班出身的设计师。

By using the transfer matrix method of multibody system, the hard problem of computation of the vibration characteristics of LRMLRS coupled with rigid bodies and elastic bodies is solved which is very difficult to the ordinary dynamic methods, and the vibration characteristics of LRMLRS which is varied when the number of rockets in the launch device is varied, is obtained conveniently. By developing augmented eigenvectors of the LRMLRS and its orthogonality conditions, the nonorthogonality problem of the multibody system including rigid bodies and elastic bodies is solved and the exact analysis of the dynamics response of the LRMLRS including rigid bodies and elastic bodies is realized. By using the random integer programming method, the hard optimization problem which contains continuous variables, discrete variables and random variables at the same time is solved. This method provides a technology for optimum design with random variables and discrete variables. The dynamic optimum design is realized to decrease the number of rockets consumption in the LRMLRS test. The simulation system of dispersion of fire is established by using the maximum entropy method to estimate dispersion of fire.

通过应用多体系统传递矩阵法，解决了刚弹耦合远程多管火箭多体系统振动特性这一通常力学方法不便于解决的计算难题，方便地获得了远程多管火箭振动特性及其随发射架上火箭弹个数变化而变化的情况；通过构造增广特征矢量及其正交性条件，解决了刚弹耦合多体系统特征矢量不具有通常意义下的正交性的难题，实现了对刚弹耦合远程多管火箭动力响应的精确分析；应用随机整数规划法，解决了同时考虑连续、离散和随机变量等多种设计变量的优化设计难题，为含随机和离散变量的优化设计提供了手段，实现了减少远程多管火箭试验用弹量的动态优化设计；建立了应用最大熵法估计的密集度仿真系统，优化射序和射击间隔，实现了提高远程多管火箭射击密集度的动态优化。

For the gold market to private investors, the market will be there If we do not understand the mentality of the hedge, do not think to make money from the past 3-5 years, the rate of return on investment of gold less than the stock market, and even less than the bond market, mainly because of government control of gold by the United States, it is difficult to predict.

对于想投资美元、加元、欧元、澳元为主的外汇业务，同样要做对冲。对于股市、楼市、汽车、奢侈品等方面的投资，其行情都是由大量的资金进入推动和造成的，其资金来源一样，是一种虚拟的经济。当资金出现转移，就会出现下跌，一时的市场回暖不是真实的，本质上不具有稳定性。

The State Research Center of the gold stock fund's Zhang Jianhui pointed out that despite the valuation of the market value of the investment in a range, to reflect the basic economic growth forecast earnings expectations continued to fall, but still in the external economic pressures, the effect of leading to a loss of market liquidity and the lack of Lack of confidence in the situation, it is expected that the market is still difficult to shake off the inertia of collation concussion.

国家研究中心的黄金储备基金的章建徽指出，尽管在一范围内的投资估值，以反映基本经济增长的预测收益预期继续下降，但仍然在外部经济压力导致市场流动性的损失和对形势缺乏信心的影响，预计市场仍难以摆脱震荡整理的惯性。

As the distributors of auto manufactures, they face the press of both auto manufactures and markets, and try to find a way of sustainable and sound develop; they found it"s difficult to be bigger and strong. How to set up autonomous brand, establish the advantage and keep company developing, it"s very important to compete in world market for distributors.

而作为汽车经营销售企业的中间商，受制于汽车生产企业与市场销售的双重压力之中，无法持续、健康的发展，更难以做强做大，如何在汽车市场进一步开放，参与国际竞争的背景下，树立自主品牌，建立自己的优势，以获得存续和发展是摆在经销企业面前的重大问题。

Many people consider the timpani to be one of the hardest instruments to play, because playing the timpani involves pitch, rhythm and tone, thus it is difficult to control them.

许多人认为定音鼓是最难演奏的乐器，因为打定音鼓需要音高、音调和节拍，所以是很难掌控它们的。

Valuation of movement probability has remained difficult to solve up to now without appropriate solution given to it.Today the movement probability used in ore-drawing simulation is still with traditional valuation all through,but it is unadaptable to mining simulations nowadays.

移动概率赋值问题至今没有一个很好的解决方法，现今的放矿仿真使用的移动概率仍然为传统的移动概率赋值方法，并且是始终不变的，已经不能适应现今矿山的仿真要求。

Medicine is used to unclose and seize mysterious physiology, pathology and pathogeny of human body, and solve problems pointedly and flexibly, but it is difficult to find a versatile medicine, operation or treatment means. So, some people cannot get away from illness despite medical treatment, some even die. Sometime, medicines are suitable for adult A, but not for adult B who has the same sickness, or do harm to infant A even lead to death; some patients get better by taking virose medicines, but others disable or die; suffering from the same sickness, some people pull through and live for another tens of years, some people die in the operating table; sickness recrudesces in some people whose families break up after several operations, etc.

医学能把人体深层奥秘的生理、病理、病因揭开并掌握，还可以针对性或应变性解决，但难以制造出广谱特效的药物和手术及用各种治疗手段来解决，所以有的病经久治疗难愈，有的病被治死，有的药可以治愈同一种病的甲成人，而不能治愈同一种病的乙成人，或对甲小儿有害甚者易致残亡；有病人服有毒性的药可以治愈病，但有的人服后致残或死；同一种病，有人手术后恢复健康活至几十年，有人死于手术台；有的手术后病情复发，然经几次手术后家破人亡，等等。

Problems such as traffic congestion, routing, energy crisis and cost control are usually to be considered for Logistics transportation system, which involves some unconventionality mathematics models and is difficult to operate effectively. Therefore it is necessary to build a vehicles monitoring system for training vehicles controlling personnel.

物流的运输系统常常需要考虑交通堵塞、路径选择、能源危机、成本控制等各种因素，涉及到众多复杂的数学模型，在实际应用中难于有效运作，于是有必要建立一个有效的运输车辆监控系统并对车辆调度员进行教学和培训。

More importantly, the underlying features are well done, so that it's easy to get good picture out of - the autofocus is pretty sophisticated, reliable and easy-to-use and in difficult-to-meter situations, the camera's exposure errs on the side of underexposure, to prevent detail being lost.

最重要的是，下面的特点是如此优秀，所以在自动对焦也可能很高的出片率，精密、可靠而且易用？？？？？，它宁可欠曝也不过曝引起细节丢失（译者注：欠曝是可以通过PS修补的）。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷