灭弧角和避雷器是必需的，因为雷击桅杆是很常见的。
Arcing horns and lightning arresters are necessary because lightning strikes to the mast are common.
所谓的弧节点列表包含弧和节点。
通常我们用符号s来表示弧长。
尤其是你怎么把弧长和时间联系起来？
Well, so in particular, how do you relate arc length and time?
新反射弧的中枢神经调节。
在这繁星闪耀的夜晚，南天银河弧明亮发光。
The arc of the southern Milky Way shone brightly on this starry night.
对速度做积分,告诉你车在轨道上走的弧长。
And, what it does is it actually integrates the speed of the time to give you the arc length along the trajectory of the car.
也许你会说，弧长在曲线上增长了，又减少了。
Actually, maybe you want to say that the arc length increases and then decreases along the curve.
带点粒子弧从表面跃起，又被再次抛回到磁场中。
Arcs of charged particles rise from the surface and are drawn back down again in the magnetic field.
连接线称为弧，笛卡尔坐标系统中的点称为节点。
The connecting lines are arcs, and the points within the Cartesian coordinate system are nodes.
接下来我想介绍一下弧长。
So, the next concept that I want to define is that of arc length.
但电缆长，会减低其起弧穿孔和切割能力。
But cable long, can reduce the arcs perforation and cutting ability.
作为规定，容器应用熔接弧焊工艺进行焊接。
在坦佩的纬度，太阳是沿着偏南的弧在地平线上升起的。
At Tempe's latitude the Sun rises at an Angle, arcing southward as it climbs above the horizon.
肌肉构造和反射弧。
新郎的妈妈盖尔弧思打开门时发现寇可站在门前。
Gail Hosey, the mother of the groom, answered a knock at the door to find Coker standing in the doorway.
要了解具有许多弧的扩展链接，请考虑来自镜像下载站点的链接。
To get the idea of an extended link with many arcs, think of a link from a download site with mirrors.
同样地，这个距离，△r的模也不完全等于它跨过的弧长。
Similarly, this distance, the length of delta r is not exactly the length along the curve.
我不知道为何要用s来表示弧长，这只是一个常用的符号。
I'm not quite sure how you get an out of this, but it's the usual notation.
据设计者所述，Quadranta的设计是从四分之一圆弧开始的。
According to its creator, this design was started with quadrant arcs.
这些镶嵌的空间切片的跨度相当于一个满月直径的三分之一(10弧分)。
This Mosaic spans a slice of space that is equal to about a third of the diameter of the full moon (10 arc minutes).
当然，被远远抛出的弧状结构的视觉形象使这对星系有个通俗名称：天线星系。
Of course, the visual appearance of the far-flung arcing structures gives the galaxy pair its popular name - the Antennae.
然而以上这张弧状银河的壮观的图片让我们达到了肉眼看不到的界限。
The above spectacular picture of the Milky Way arch, however, goes where the unaided eye cannot.
虽然美国宇航局用它来给航天飞船的燃料箱加压，氦主要还是用来做弧焊和裂纹检测。
Helium is used for arc welding and leak detection, mostly, although NASA USES it to pressurize space shuttle fuel tanks.
沉积物被从两侧的弧前脊和岛弧冲到盆地，使该处地壳承重增加，形成洼地。
Sediments washed into the basin from both the fore-arc ridge and island arc weigh down the crust in this area, creating the depression.
在该方案在F16战斗机上部署之前，蓝弧公司负责品质保证软件的最终测试。
The BlueArc solution plays a part in the final testing of software for quality assurance before it is implemented in F16 aircraft.
该书大部分都是关于他们实际存在一些的问题—外扩的线条，垂曲弧，穹型拱顶。
Much of the book is about their practical problems-thrust lines, the catenary curve and groin vaulting.
又有麻生外相述及“自由与繁荣之弧”，谓自日本始，辗转入印度，终经温和之中东而入欧。
Mr Aso speaks of an “arc of freedom and prosperity” from Japan, swinging through India via moderate Middle Eastern states into Europe.
在这种情况下，如果在来回运动，第一次增长的弧长更有意义，接着减少，再增长，诸如此类。
But, in this case, if you are moving back and forth, it would make more sense to have the arc length first increase, then decrease, increase again, and so on.
在这种情况下，如果在来回运动，第一次增长的弧长更有意义，接着减少，再增长，诸如此类。
But, in this case, if you are moving back and forth, it would make more sense to have the arc length first increase, then decrease, increase again, and so on.
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