焦点

That point must be placed in the focus of the parabola as precisely as possible!

这一点必须尽可能准确地放置在抛物面的焦点！

Focus of the parabola, practically, is in the entrance in the waveguide of the converter.

抛物线的焦点实际上是在变频器波导入口处。

A calculation method and calculation results that show that a new kind of shaped paraboloid antennas can produce a ringy radiation pattern is presented.

通过数值计算发现将抛物线绕通过焦点的非抛物线对称轴旋转而形成的赋形抛物面天线可产生环状的方向图主瓣(此主瓣指的是主瓣最大值处)。

For example, reflecting telescopes are still built with paraboloidal primary mirrors, which have interchangeable flat diagonal mirrors and hyperboloidal secondary mirrors, with a focuser installed both at the Newtonian focus and the Cassegrain focus.

例如，同样是抛物面反射望远镜，然而安装了可切换的45度反射镜与双曲面副镜（注：分别对应于典型的牛顿与卡塞系统），且在牛顿和卡塞焦点都装有成像设备。

Focal power tells us .what a lens dose to parallel rays.

焦点光度表示透镜对平行光线所起的作用。

A minus one diopter lens diverges parallel rays as if they were coming from a focal point at 1 m.

一度的负透镜可以使平行光线发散开来，仿佛这些光线发自于距透镜1 m 远的焦点。

Myopia: As axial length is too long, due to refractive eye refractive power of the system is too strong, resulting in 5 meters away from the formation of the parallel light rays focus before the retina.

近视眼：由于眼轴过长，由于眼球屈光系统的屈光力过强，以致5米以外的平行光线在视网膜之前形成焦点。

The specificity of the surface gained in this way is that when the beam of rays parallel to its axis of rotation falls on it, the beam is reflected so that all the rays meet in one point, known as the focus, in the same way that optical lenses focus light rays in their focus.

抛物线的表面或曰抛物面，是由抛物线围绕其对称轴旋转而成，其特点是，和抛物线对称轴平行的射线波束被抛物面所反射，所有的电波都在同一点汇聚， 1 September，2009 3D 角反射天线作馈源的 5.8GHz 偏馈抛物面天线我们把这点叫做焦点。

It would've worked wonderfully as a parquet floor tile or used as a faux woodgrain instead of the focal point on the wall.

一个带有镶花设计的瓷砖地板或是用一个仿木纹的设计来取代墙上设计的焦点，这样设计所产生的效果都会非常的令人惊奇。

Presently, with does not love the focal point which patriotically into the people discussed that goes patriotically with any way, is also the topic which discussed for a while, when the disaster arrives quietly, to be how patriotic, already really suspended at people's front.

当前，爱国与不爱成为人们议论的焦点，用什么方式去爱国，也是一时议论的话题，当灾难悄悄降临的时候，怎样爱国，已经真真实实地摆在人们的面前。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。