line-of-sight communication是什么意思

网络释义

用法例句

Furthermore, ultraviolet optics can realize non-line-of-sight communications in certain area because of its dispersion.

由于紫外光的散射性很好,所以能实现特定区域范围内的非视线通信,这也是紫外光通信非常吸引人的一个地方。

However, there are still severe technical challenges in wireless video communications, because the error-prone and time-varying band-limited wireless channels always have difficulty in meeting the requirements for large-data-volume and high-service-quality video transmission.

这都难以满足视频业务高速率和高服务质量的传输要求,使得无线视频通信在实际应用中仍面临着严峻的技术挑战。

Discussed about Lofting Under the Barrier Line Segment Station at Any Point

在任意点设站进行不通视直线段测设的讨论

Motion across the line of sight can be followed by direct observation.

与视线垂直的运动可以通过直接观测得到。

I am never able to get through to the hot-line of this program.

这个栏目的热线电话一直打不通。

Sheet edges are normally either graduate lines or grid lines.

页面图廓，通常不是经纬网线，就是直角坐标网线。

The road extended in a reasonably straight line for almost a hundred yards before bending around a tree.

小道绕过一棵大树通来，有百来码长的一段大致成一直线。

The plane figure formed by connecting three points not in a straight line by straight line segments;a three - sided polygon.

三角形一种由直线线段连接不在一条直线上的三点形成的平面图形；三边图形

The normal law enforcement tactics (undercover agents, informants, surveillance) relative to the primary violation cannot reach the target.

用于普通犯罪的一般手段（比如密探、线人、监视）根本无法深入到.

An adapter threaded to permit joining of pipes with different diameters.

导线套管允许不同直径的导线形成的导线束通过的衬套

The light does not go straight, but is deflected.

光并不是沿直线通过的，而是被弯曲了的。

Direct Broadcast Satellite (DBS)/DTH - Service that transmits satellite signals directly to a home, typically through a viewer's receiving dish. Also called DTH for direct-to-home.

直播卫星-通过接收者的圆盘天线，直接从卫星把信号传送到户的卫星服务，也称为直接入户电视。

marine frequency band

船用无线电通信波段

three-diameter ells with tangents

带切线直管段的三倍直径弯头

out of alignment (with...)

(与…) 不成直线的

From "TV Transmission" to a Live Radio Programme;

从“直播”到直播——论电视新闻现场直播的发展阶段

One complete length of a straight course, as of a swimming pool.

直线的路径一段完整的直线距离，如游泳池

A line segment representing all the numbers between a pair of given numbers and including one, both, or neither of the endpoints.

区间段代表一对已知数之间包括一个或两个端点、或不包括端点的所有数的一直线段

general epicycloid circular arc spur gear

普通外摆线圆弧直齿轮

direct cross-boundary coach service

过境的直通旅游车路线