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？
