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Dorsalis invading to Guangzhou was about 590,which could form about 295-372 mating pairs,and there is little difference between the results calculated by Classic PERT and Monte Carlo simulation. Therefore,the importing risk really exists.

结果表明，橘小实蝇累计传入数量为590～598头，能够形成295～372对潜在交配成虫，经典PERT模型和Monte Carlo仿真的计算结果很接近，传入风险确实存在，为100%。

In terms of the transmission shaft balancing, it exists another problem that the shaft is not looked at as rigid body.When the rotor running at a high-speed ,under the action of unbalance force ,the transmission shaft will bend. It is certainly ideal to balance a transmission shaft as a flexible rotor.However, considering the mass production of automobiles, this method is obviously unpractical. In order to discreasing the flexible deformation, in this theory, the feasibility that double- plane balancing takes method the place of multi-plane balancing on a special place for one segment transmission shaft.

从传动轴平衡的角度来看，传动轴并非刚体，在汽车高速旋转时，由于不平衡力的作用会使传动轴发生挠曲，如果将传动轴作为挠性转子进行平衡当然比较理想，但是不符合汽车大批量生产的实际，为减少挠曲振动，利用挠性转子平衡原理，对于单根传动轴，从特殊位置进行校正，从而以二面平衡代替多面平衡是可行的。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

On the base of finishing image matching, Aiming at the fact that sequence image matching and binocular stereo image matching simultaneously exists in three dimensions movement analyses based on point feature, The method of double matching restrict combining sequence and stereo image matching is brought forward in matching distinctness stage after researching and anglicizing the character of sequence matching and stereo image matching in processing.

在完成图象匹配的基础上，针对基于点特征的三维运动分析中，同时存在序列、立体图象匹配问题，研究分析该过程不同匹配的特点，提出了序列、立体匹配相结合，分阶段的双匹配约束方法。

An ambiguous condition exists if the exponent of r is too large to be accommodated in IEEE double-precision format.

如果 r 的指数部分大於能以 IEEE 双精确格式容纳时，将会有模稜两可的情况存在。

An ambiguous condition exists if the exponent of the IEEE double-precision representation is too large to be accommodated by the internal representation.

如果 IEEE 的双精确表示法的指数部分大於能以内部表示法容纳时，将会有模稜两可的情况存在。

At present, there exists double-track system according to different investors, in another words, two sets of enterprise income tax law system are separately applied in overseas-funded enterprises and internal-funded enterprises.

接着，作者结合工作实践，从四个方面对我国企业所得税法律制度的现状和存在问题进行了具体分析和深入研究，指出必须改革和完善我国企业所得税法律制度。

According to the empirical analysis, author finds that, both in the up-market and down-market, certain herd behavior exists on the stock market of our country and securities investment funds.

通过实证分析，我们发现：无论是市场上涨阶段还是下跌阶段，我国A股市场存在一定的羊群行为，我国证券投资基金也存在显著的羊群行为。

The comparisons show that they have the same variation trends though there exists a departure of 20%, and the model proposed in this paper can preferably forecast the complex flow in the reactor downcomer.

该模型能较好地预测反应器下降管内的复杂流场。

There exists four different parts in local basin thermal circulation: cold downslope wind at nighttime, converctive boudary layer development and cold air lake disappearance in morning, thestrong upslope wind system at noon, and circulation reversal around sunset time.

盆地热力环流存在四个明显的分区，即夜间冷下坡风和冷湖的堆积，清晨对流边界层的发展和冷湖的弥散，正午时分强热力上升环流和日落前后热力环流的逆转。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！