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1·In molecular orbital theory, we named orbits based on their symmetry.

在分子轨道理论中，我们基于轨道的对称性给它们命名。

2·The main axis of the planet's orbital ellipse shifts each time when it goes around the sun.

当行星绕太阳运行时，其轨道椭圆的主轴每次都会改变。

3·Newton for years had been curious about the cause of the orbital motion of the moon and planets.

多年来，牛顿一直对月球和行星绕轨道运行的原因感到好奇。

4·Here's the pneumonic I mentioned for writing the electron configuration and getting those orbital energies in the right order.

这是我提到的肺，用于写电子构型，并以正确的顺序得到轨道能量。

5·What is a space vehicle launching entity required to do according to the current Government Orbital Debris Mitigation Standard Practices?

根据现行的政府轨道碎片缓减标准做法，航天器发射实体需要做什么？

6·The goal was to measure the AU; then, knowing the orbital speeds of all the other planets around the Sun, the scale of the Solar System would fall into place.

目标是测量 AU；随后，当我们知道了所有围绕太阳的其他行星的轨道速度，对太阳系的规模就有充分的认识了。

7·The disk exerts its own gravitational tug, and this interplay of forces robs the planet of momentum in its orbital path, forcing it to spiral in toward the star.

圆盘产生自己的引力拖曳，这种相互作用的力夺走了行 星在其轨道上的动量，迫使它盘旋向恒星的方向。

8·Its radio begins to transmit an astonishing amount of information about the satellite's orbital path, the amount of radiation it detects, and the presence of meteorites.

无线电开始传输大量信息，都是关于卫星的轨道路径、探测到的辐射量以及陨石的存在的。

9·For sometime this theory was considered untestable, largely because there was no sufficiently precise chronology of the ice ages with which the orbital variations could be matched.

有一段时间，这一理论被认为是不可检验的，主要是因为没有足够精确的冰河时代的年表与轨道的变化相匹配。

10·First, a climate conducive to life on Earth depends upon the extraordinarily narrow orbital parameters that define a continuously habitable zone where water can exist in a liquid state.

首先，地球上适宜生命存在的气候取决于极其狭窄的轨道参数，这些参数定义了一个持续可居住的地带，在那里水可以以液态存在。

(1)molecular orbital分子轨道

(1)orbital elements轨道要素；轨道根数；轨道参数；轨道元

(1)orbital angular momentum轨道角动量

(1)orbital module轨道舱

(1)hybrid orbital[化]杂化轨道

(1)orbital motion轨道运动，轨道运行