既...又...

At all angle s less than the critical angle , both reflection and refraction occur.

对于所有小于临界角的入射角，则既发生反射，又发生折射。

At all angles less than the critical angle, both reflection and refraction occur.

对于所有小于临界角的入射角，则既发生反射，又发生折射。

The building aroma integrates the western plus the eastern style and features, as well as the Greek's cromlech, Chinese traditional type of rooftop.

建筑风格揉合了东、西方建筑特色，既有仿希腊复古式圆形石柱，又采用了中式的瓦面斜顶的屋顶，配合香港特殊气候，别具特色。

Together, these traditions of corruption and cronyism have produced a state that is both bloated and malnourished, and a crisis of confidence that is shaking all of Europe.

总之，这些腐败和任人唯亲的传统造就了一个既臃肿又无力的政府，并酝酿了一场撼动整个欧罗巴的信心危机。

On the base of Simple Genetic Algorithms, ranking every generation's fitness, and add the function which can control the cross rate and mutation rate. This way not only can overcome the SGA's slowly speed of constringing and bad stability, but also can improve the effect of optimizing function.

该方法在简单遗传算法的基础上，将每一代染色体的适应度排序，并添加了交叉率和变异率的自适应控制函数，既克服了简单遗传算法收敛速度慢，稳定性差的缺点，又改善了函数优化效果。

A method of time delay estimation by two times spectral analysis, where the time delay is the time interval between peaks of spectrum of the cross power spectral density, is proposed in the paper. It can be used to estimate time delay of not only single target but also multi-target without unwrap.

本文提出了两次谱分析时延估计方法，即将互功率谱函数再次进行谱估计，二次谱峰值位置间距即为时延估计，这种方法既能够估计单目标时延，又能够估计多目标时延，并且不用相位解绕。

However, there should be no need to work at cross-purposes: it is quite possible for the student to go on learning a language and to prepare for an examination at the same time.

然而，两者实在无需背道而驰：学生同一个时间既研习一种语言又准备考试，是相当有可能的。

The cross-talk, I think, was both interesting and instructive.

相声，我觉得，既有趣又能教育人。

It making the bean curd crouton in a form of retort pouch , the storage time could expand and the product be easy for eating .

将油豆腐制成软罐头的形式，既能延长其保质期，又便于食用。

Cryptology is an age-old and fresh science and technology on studying communication security and information protection.

密码学是一门研究通信安全和保护信息资源的既古老而又年青的科学和技术。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。