轨道的

GEO environmental degradation trend of 15years on solar absorptance for thermal control coatings such as S781 white paint, SR107-ZK white paint, silvered FEP, and OSR on the outer satellite are simulated by a combined low energy irradiation test.

文章用综合低能辐照试验模拟15年地球同步轨道环境对热控材料S781白漆、SR107-ZK白漆、镀银FEP、OSR片的太阳吸收率退化趋势。

Now that you have the idea of placing overlay, you can start to build up simple level tracks.

既然现在你已经明白了如何放置覆盖物，你可以开始建立简易的层次轨道了。

In this paper, the gauge widening and rail overturning under the different parameters of track structure are discussed.

本文从理论上讨论了在不同轨道刚度条件下的轨距扩大和钢轨侧翻问题

Pantograph is one of the most important parts of urban rail vehicles.

受电弓是城市轨道交通车辆的重要部件之一。

The experts said that given the nearly parabolic shape of its orbit, the comet Lulin first visit may also be the last.

专家们表示，鉴于其近抛物形轨道，鹿林彗星的第一次造访也可能是最后一次。

6The path of a projectile is a curve.

track：通常指跑道、轨道，有时也指崎岖的小路。

This planet is orbiting a star in the Pegasus constellation some 50 light years away.

这颗行星绕飞马座中的一颗恒星做轨道运动，距离约为50光年。

The point in an orbit at which the satellite is closest to the Earth is known as the perigee.

轨道上离地球最近的点称为近地点。

The satellite first makes elliptical orbits around Earth of larger and larger apogee, while the perigee remains around 300 kms only.

该卫星首次使椭圆轨道围绕地球的远地点，而近地点仍然只是约300公里。

In fact, tonight's Moon reaches its full phase at 1637 UT, within only a few hours of perigee, the closest point in its elliptical orbit.

事实上，今晚的月亮将在世界时间16点37分达到满月相位，仅仅是月球在到达近地点数个小时之后，月球位于近地点时，其椭圆轨道距离地球最近。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。