In the case of terrestrial communications over long distances , optical pipes, lens systems, and fibre optics have been suggested as alternate transmission approaches, and all these may materialize as economic and reliable competitors or adjuncts to existing communications facilities.

就远距离地面通讯来说,光缆、透镜、光纤都被作为不同传输方式在进行研究,都会成为对现有通讯设施的既经济又可靠的竞争者或补充。

属类：行业术语-传媒-电子媒体

Scientists have studied the migration of fish over long distances in the river.

科学家研究过江中的鱼类远距离洄游的现象。

属类：综合句库--

Still it appeared as though they were stationed at equal distances from one another, like sentinels

可是,他似乎觉得每隔一段的距离就站着一个人,象哨兵似的。

属类：综合句库--

But here we come up against the most difficult of all obstacles to contact with people on other planets--the astronomical distances which separate us.

可是在这里我们遇上了同其他行星上的人们进行联系时最难以克服的障碍--隔开我们的天文学距离。

属类：学习英语-新概念英语-第四册

Drag or slide cylinders, even for short distances .

拉拽或滑动钢瓶,即使是很短的距离。

属类：产品说明书-产品安全-

Walking distances are short downtown, and everything worth seeing outside the city center can be quickly and conveniently reached by bus

雷克雅未克的市中心不大,可徒步环游。市区外任何值得一看的景点都有快速、方便的公共汽车直达。

属类：综合句库--

Similarly, our own present primitive chemical rockets, though good enough to orbit men, have no chance of transporting us to the nearest other star, four light years away, let alone distances of tens or hundreds of light years.

类似地,我们自己目前的原始化学火箭虽然已能把人送入地球轨道,却根本无法将我们送到4光年以外的最近的恒星上去,更不用说百十光年以上的距离了。

属类：学习英语-新概念英语-第四册

stereoscopic vision is the direct perception of distances of objects, using both eyes

立体视觉是两眼对物体距离的直观感觉。

属类：综合句库--

The light tonguelike streaks indicate distances the reflective flakes traveled during the exposure time of the photograph, 1/30 second

亮的舌状条纹表示反光薄片在曝光的一刹那间(1;30秒)所运行的距离。

属类：综合句库--

but a power of estimating the adversary, of controlling the forces of victory, and of shrewdly calculating difficulties, dangers and distances , constitutes the test of a great general

料敌制胜,计险隘远近,上将之道也。

属类：综合句库--

A long-legged,swift-running wild cat(Acinonyx jubatus)of Africa and southwest Asia,having black-spotted,tawny fur and nonretractile claws.The cheetah,the fastest animal on land,can run for short distances at about96kilometers(60miles)per hour.

猎豹产地为非洲及西南亚的一种腿长、善奔的野生猫科动物(猎豹),毛为黄褐色带黑斑,爪为不可缩回式。猎豹是陆地上行动最快的动物,短距离奔跑速度可达每小时96公里

属类：综合句库---(60英里)

On the other hand, at greater distances , only those most easily ignitable will catch fire

另一方面,在距离较远的地方,只有那些容易燃烧的材料才会着火。

属类：综合句库--

That businessman flies great distances every month.

那个商人每月都乘飞机来回很远的地方。

属类：综合句库--

Should airlines compete on similar routes allowing planes to fly long distances with empty passenger seats?

难道航空公司还应该为了在类似的航线上竞争而允许他们的客机有空座的长途飞行吗

属类：社会文化-新闻报道-

Not only can walking fish live out of water, but they can also travel short distances over land.

鲇鱼不仅可以离开水存活,还可以在岸上短距离移动。

属类：社会文化-新闻文摘-

Are you proficient at judging distances ?

您擅长判断距离吗?

属类：综合句库--

The distances are additive along the length of the chromosome

其距离值就是沿着染色体长度方向的累加。

属类：综合句库--

It can detect, track, and identify low-flying aircraft at a distance of 200 nautical mi (370 km)and high-level targets at much greater distances . It can also track maritime traffic and operate in any weather.

其雷达系统可探测、跟踪和识别距离200海哩(370公里)的低空飞机和更远的高空飞机,还可跟踪海上船只,并在各种气象条件下工作。

属类：工程技术-军事科技-

crane lorry (excl. crane trucks designed for moving loads over short distances in factories,warehouses,dock areas or airports)

起重卡车(不包括供在工厂、仓库、码头或机场进行短距离运货的起重卡车)

属类：物品名称-交通工具-

Jack:In practical mechanics, portable hand-operated device for raising heavy weights through short distances , exerting great pressures, or holding assembled work firmly in position.

千斤顶:在应用力学中,指携带方便、以手操作的装置,可将重物稍微抬高,能施加巨大压力,或将装配好的对象牢固地支撑在原地。

属类：工程技术-机械与工具-

Parallax correction marks in the viewfinder can help avoid chopping heads and feet off at close distances .

取景器中的视差纠正线能帮助避免近距离摄影时削掉头和脚。

属类：综合句库--

A surveying technique in which a region is divided into a series of triangular elements based on a line of known length so that accurate measurements of distances and directions may be made by the application of trigonometry.

三角测量法一种测量技术,通过将某一地区分成许多三角形,这些三角形是以一条已知长度的线为底,由此可通过使用平面直角三角形计算工具精确地测量距离和方向

属类：综合句库--

Because the camera can come in close on a film actor and can record his performances from all sides and distances , the best film performances are completely natural.

摄影机可以近距离拍摄,可以从任何角度,任何一个地方拍下演员的表演,因此,完全自然的表演是最好的电影表演。

属类：社会文化-表演艺术-电影

infiltration water, the rainfall which enters the ground and becomes ground water, can travel for long horizontal distances

渗透水,即渗入地下变成地下水的那部分雨水,能在地下做长距离的水平流动。

属类：综合句库--

The advantages of acoustical techniques reside in the fact that sound waves can propagate considerable distances in dense liquids and solid where light cannot

声学方法的优点在于声被在稠密液体或固体中可以传播很远,而光却不能。

属类：综合句库--

Having fine threads across the field of view for measuring small distances ,as in the eyepiece of a telescope.

视域里画有丝纹的有用于测量小距离的通过视野的细线的,如在望远镜的目镜片中

属类：综合句库--

We use high-frequency, or short-wave, radio to communicate over long distances because it is convenient, although distorted at times.

虽然短波有时失真,但由于使用方便,因此,我们还是用它来进行远距离通信。

属类：工程技术-科技英语-

But though air cyclists may learn how to fly over short distances , and may, eventually, even get across the English Channel, it is doubtful whether they will ever cycle across the Atlantic.

虽然空中自行车骑手可以学会怎样作短距离飞行,而且最后甚至可以飞越英吉利海峡,但是否能飞越大西洋则尚属可疑。

属类：学习英语-新概念英语-第二册:lesson 66

Sun Tzu said: Raising a host of a hundred thousand men and marching them great distances entails heavy loss on the people and a drain on the resources of the State. The daily expenditure will amount to a thousand ounces of silver.

孙子曰:凡兴师十万,出征千里,百姓之费,公家之奉,日费千金。

属类：习语名句-古文名句-孙子兵法

Shortens stopping distances in curves and on slippery road surfaces

缩短在弯道或湿滑路面上的刹车距离

属类：单位简介-汽车公司网站-奔驰天下