| 1. | States that the square of a planet s orbital period is proportional to the cube of its average distance from the sun
：行星公转周期的平方和其与太阳平均距离的立方成正比。 |
| 2. | They showed mathematically that if this were true , the orbital periods of the two stars should change by exactly the amount astronomers observed
他们用数学方法得的双星运行周期的变化量正好符合天文学家们的观测结果。 |
| 3. | The list on the left side of the dialog shows the names of all the objects in the current data file , together with each object ' s orbital period in minutes
对话框左边的目录显示了当前数据文件中的卫星名称及其按分钟计算的轨道周期。 |
| 4. | Scientists joseph taylor and russell hulse suspected that the change in orbital periods was because the stars were losing energy as gravitational waves
科学家小约塞夫?泰勒和拉赛尔?赫尔斯猜测双星运行周期的变化是由于引力波的产生导致了能量的损失。 |
| 5. | This gradient in orbital periods causes shear : bits of material at slightly different distances from the center of the disk slide past one another [ see box on page 54 ]
这种轨道周期的梯度变化会引起切变：距离圆盘中心远近稍有差异的物质，会彼此超前或落后（参见第67页圆盘如何旋转与辐射） 。 |
| 6. | The analysis shows that the wait time and maneuver impulse have close relationship to target ' s orbital period . if the time waited properly , the maneuver impulse can be greatly reduced
然后,对机动前待机时间进行了探讨,研究表明机动前待机时间与目标器轨道周期密切相关,且机动前待机时间的存在大大降低了交会机动变轨能耗。 |
| 7. | Despite the moon ' s rotational and orbital periods being exactly locked , we may actually observe about 59 % of the moon ' s total surface with repeated observations from earth due to the phenomena of librations and parallax
尽管完全地被锁的月亮的回转而轨道的期数，我们由于振动和视差的现象可能实际上用来自地球的重复的观察观察大约59 %月亮的完全表面。 |
| 8. | The numerical computation for the secular variable of the semi - major axis , solar distance at perihelion , orbital periods and longitude of perihelion has been made for fifteen meteor streams by using the solution of gylden - meshcherckii equations
利用g - m型变质量天体轨道根数变化方程的一阶和二阶解对15个流星群轨道半长轴、近日点距离、轨道周期和近日点经度因太阳质量损失造成的每世纪的长期改变效应做了数值计算，并得出计算结果。 |
| 9. | The results show that the solar mass - loss extends the semi - major axis , the distance at perihelion and orbital periods of the meteor streams , especially , the extensive influence on the semi - major axis is not overlooked , but this influence on other orbital elements may be neglected
其计算结果表明，太阳质量损失使流星群轨道半长轴每世纪的改变效应较明显，它们同太阳距离的扩大影响值得关注，但对轨道周期的拉长每世纪的影响甚小，对近日点经度只有量级变化小到可以略而不计。 |
| 10. | Our results show that , during the evolution of a binary system , the system widens as it loses mass , and the orbital period increase , while orbital eccentricity remains nearly constant , which can explain the distribution regulation of orbital elements of normal g - k giant and barium stars and the distribution character of the heavy - element abundances of barium stars
计算结果表明，随着星风吸积过程的进行，在星风质量损失阶段系统轨道半长轴将增大，导致轨道周期增大，而偏心率变化不大，由此可以解释普通红巨星双星系统和钡星系统的轨道根数的分布规律和变化情况以及钡星重元素丰度分布特征。 |
