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In his early work on general relativity, Einstein realized that over cosmic distances space might not conform to the principles of euclidean geometry - that is, the sum of the angles of a very large triangle might not equal exactly 180

爱因斯坦在早期研究广义相对论时就已认识到，在宇宙规模的距离上，空间是不可能符合欧几里得几何的原理的，这就是说，一个非常大的三角形的内角之和不可能正好等于180度。

Families who can afford it, keep ponies, and many people hire horses from riding stables, for riding is very popular, especially among girls. You can go pony trekking (riding long distances with a guide) in the wilder parts of Britain, on Exmoor and Dartmoor in the West Country, and on the hills and mountains of northern England, Scotland and Wales.

区为骑马在女孩子们中特别流行，所以有经济条件的家庭常养些小马驹，还有许多人从马房里租马，然后去英国荒原、西部地区的艾克斯木尔和达特木以及北英格兰、苏格兰和威尔士的群山之随骑马缓行（在导游的带领下长途跋涉）。

In the method of space constant, the relation between inter-electrode distances and correlation coefficients were fitted to two exponential decay curves.

在空间常数的方法上，我们采用两个指数递减之曲线，分别对不同电极间距之相关系数回归。

The Pd-Cu/C catalysts were shown to have the face centered cubic crystal structure. This could indicate that the addition of Cu shortened the Pd-Pd distances in the crystal lattice, and therefore –HO(subscript 2ads) and O-O could be better adsorbed on the surface of the catalyst. When NaBH4 was used as the reducing agent, and the atomic ratio of Pd to Cu was 3:1, the resulting catalysts had an average particle size of 3. 4nm and showed the best catalytic performance. The electrochemical active surface are a of Pd3Cu/C was 38.9m^2/gPd and the oxidation reduction reaction activity of the Pd3Cu/C catalyst was much higher than that of the Pd/C catalyst. The electrochemical activity of the Pd3Cu/C catalyst was comparable to that of a commercial Pt/C catalyst.

结果表明：催化剂中Pd与Cu的物质的量之比与预设值相近，Pd和Cu基本被全部还原；Pd-Cu/C催化剂为面心立方结构，元素铜的加入使催化剂的Pd-Pd间距缩小，从而HO(下标 2 ads)和OO键能更好地吸附在催化剂金属表面；当采用NaBH4为还原剂，Pd与Cu物质的量比为3：1时，催化剂(Pd3Cu/C)的平均粒径为3.4 nm，催化剂的催化性能最好，电化学活性表面积EAS达到38.9平方公尺/gPd，电化学性能较Pd/C催化剂有很大提高，接近Pt/C商用催化剂。

Such faults are straight over long distances and the fault plane is nearly vertical.

这种断层笔直地延伸到很远的地方，而且断层面几乎是垂直的。

This burst waveform has benefits compared to a continuous wave emission in that the laser peak power can be very high for measuring long distances, yet the average power can be kept low for eye safety. And more, the pre-amplified optical receiver possessing temperature compensation and feedback resistance noise compensation is designed which is based on the noise spectrum density theory of silicon avalanche-photodiode.

同时根据硅雪崩光电二极管噪声谱密度理论，设计了具有温度补偿和反馈电阻噪声补偿的激光测距仪前放接收模块，详细分析了背景光，反向高压和反馈电阻对于Si-APD接收性能的影响。

A glass ferrule is added to the end of the fibre, at varying distances from the tube, and this is then polished at angles as specified by the customer.

光纤末端添加一个玻璃套管，在与金属管相隔不同距离的位置上，然后再按照客户指定的角度进行抛光。

The components of the Fiedler vector were weighted on the corresponding vertices of graph such that differences of the components provide information about the distances between the vertices.

摘 要：在多水平方法初始剖分阶段提出了一种基于谱方法的无向赋权图剖分算法SPWUG，给出了基于Lanczos迭代计算Laplacian矩阵次小特征值及特征向量的实现细节。

The depth of field of a lens is its ability to keep in focus objects of varying heights or objects located at various distances from the camera.

一个镜头之景深使其能够于不同高度目标物或目标物处于由摄像机不同距离时保持在焦。

Although massive filamentary structures have been often observed at relatively small distances from us, solid proof of their existence in the more distant Universe has been lacking until now.

虽然在相对较小的距离内，我们常常观测到这类大质量丝缕结构，但在本报告之前，如此大距离上的确凿证据却一直缺乏。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。