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The new FS series employs fully hard over-coated fluorite and low dispersion elements in an air-spaced f/8 doublet design that provides the highest contrast, brightest, and sharpest images in an apochromatic refractor today.

新的FS系列使用了完全硬镀膜和低色散透镜，两片空气间隔的透镜f/8能提供最大的成像对比度、亮度和锐度。

The lens system comprises four separated lens components, with three of them being subapertures. Two examples of apochromatic telescope are presented, both with the use of typical normal glasses, namely crown K9 and flint F5 glasses, and low-cost slightly anomalous dispersion glasses.

本文介绍了一种采用小异常色散玻璃复消色差的新型结构形式的光学系统，由四个分离的透镜组构成；给出了两个望远镜物镜设计实例，均使用价格便宜的非异常色散玻璃，校正了二级光谱、倍率色差，同时也校正了其他色差和单色像差。

Her current research includes (1) an analysis of cokemaking and steelmaking technology options in the People's Republic of China,(2) socioeconomic impacts of the silent aircraft initiative in the United Kingdom,(3) economic growth in distressed counties in Appalachia, and (4) spatial dispersion of innovation.

她现在的主要研究方向是：（1）中国煤炭行业和钢铁制造业技术选择分析。（2）英国开发静音飞机带来的社会经济影响。（3）阿帕拉契亚经济欠发达地区的经济增长。（4）创新的空间分布。

Based on the theory of Core-Core dispersion,the apparent amplitude frequency was computed using the complex resistivity on elliptical sphere with central gradient array.

基于柯尔-柯尔频散理论，采用中间梯度上椭球体的复电阻率计算相应的幅频率，讨论椭球体的充电率、中心埋深和长轴倾角对幅频率异常和曲线形态的影响；研究幅频率资料的反演算法。

Dispersion measurement of optical glass and discussion of the approximate calculation method .

光学玻璃的色散特性测量及近似计算方法的讨论。

Pulsed release pellets of DS were prepared by using low-substituted hydroxyprolcelluloseas inner swelling layer and aqueous ethycellulose dispersion-Surelease as outer controlled membrane on a mini-fluidized bed spray coater.

采用微型流化床包衣设备，以低取代羟丙基纤维素为内层溶胀层材料、乙基纤维素水分散体为外层控释层材料制备了双层衣膜的包衣微丸，并对包衣工艺和影响药物释放的因素进行了考察。

Our model is valid for any arbitrary fiber dispersion parameter,input power distribution, independently of transmission distance, channel number andunequal channel spacing.

该模型适用范围广，可用于各种Raman增益参数，任意信道间隔，不同的光纤色散参数，各种大小、形状的输入光功率信号，而且不受传输距离和复用信道数目的影响。

The high dispersion of Mo species and suicable strength of surface acidity of the catalysts favored the aromatization reaction.

在Mo/HZSM-5催化剂中，高分散状态的钼物种和适当强度的酸中心，有利于芳构化产物的生成。

In the paper, the macro-sizes of the asphaltene colloidal particles were investigated based on the previous study of the dispersion characteristics of asphaltene in organic solvents.

在研究沥青质胶体分散特性的基础上，进一步了研究沥青质胶态粒子的宏观结构尺寸。

This paper consists of three parts:We first consider the non-autonomous predator-prey system with both Beddirigton-DeAngelis functional response and dispersion. By using comparison theorem of differential equation, we study the permanance of the system. After that, by constructing suitable Lyapunov function, we obtain some sufficient condition which guarantee the existence of globally asymptotically stable almost periodic solution of the system.

本文研究三方面的内容：第一部分考虑具有扩散和Beddington—DeAngelis功能反应的捕食-食饵系统，利用微分方程比较原理得到该系统一致持续生存的条件；通过构造适当的Lyapunov函数得到了该系统存在全局渐近稳定概周期解的充分条件。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。