查询词典 precession

He spent 10 years in observing the gnomon of 8 "chi" and obtained a precession of the equinoxes of only one degree every 45 years and 11 months.

他花10年的观察8教程&智&，并获得了岁差的分点只有一个度每45年零11个月。

Another characteristic of sun-earth system is the gradual precession of the equinoxes and solstices along the orbit.

日地系统的另一个特点是二分点和二至点沿轨道逐渐运动。

The reason is that, while the precession of the equinoxes is fairly steady, the apparent speed of the Sun during the year is not. When the Earth is near the

这个原因是，分点的进动是很稳定的但太阳的速度在一年中明显的有所不同，当地球在轨道的

In particular, precession of the equinoxes is the change in the orientation of Earth's axis which resembles a wobbling top, a complete cycle of which takes approximately 25,800 years.

其中 &分点岁差&是指地球的自转轴所发生的岁差现象(地球进行一个完整的岁差圈需要约 25，800 年的时间)。

The Galaxy runs on Cycles of time, known as the Precession of the Equinoxes.

银河运行作为分点岁差已知的时间周期。

Research centers on the four heart aspects about contentious problem of the precession of the equinoxes in China.

并由王朴在《钦天历》中构造的九服晷影函数，导出中国数理天文学史上第一个函数关系明确的正切函数表达式。

Methods Through repeated testing and practical application, the ways of "3-lines" is used in the ground precession standardization. The first line is guard line of the left marginal of the shelter, the second is allocation line of the end part of the shelter and the third is front wheel alignment line of the whole unloading vehicles.

通过反复实验测量和实际应用，采用&三线&法在场地先行标定，第1条线是方舱左侧边缘的标志线，第2条线是方舱尾部定位线，第3条线是整装整卸车前轮定位线。

This passage, from the angle of rotating mechanics, analyses the effect that the precession effect of the propeller and engine rotor has on flying qualities and operation qualities among giant turboprop airplanes.

从转动力学的角度，分析了在大型涡轮螺旋桨飞机中，螺旋桨和发动机转子进动效应对飞机飞行品质和操纵品质的影响。

In chapter 3, the characteristics of relative motion of small satellite based on ground station are firstly analyzed, in which using spherical trigometry, the analytic formulas evaluating the longitude ranges of ascending node which can cover the target are deduced with J2 precession. With the solution, the longitude ranges of ascending node limited by the cross-time can be gained. Secondly, a serious of characteristics of small satellite to space station is studied.

在第3章，首先分析了卫星相对地基的运动特性，在地基的运动特性研究中，重点研究了以升交点地理经度来描述所有能覆盖到目标点的轨道，利用球面三角形方法推导了在考虑地球形状J2项摄动影响时，各种情况下能覆盖目标点的轨道升交点经度范围，得到了完整的解析表达式。

Every year for the last 1000 years or so, on the winter solstice, the Earth, Sun and the galactic equator come into alignment, and every year, precession pushes the Sun's position a little way further through the Milky Way's band.

每一个在过去1000年左右每年冬至，地球，太阳和星系的赤道开始调整，每年，岁差推动太阳的立场一点的方式，进一步通过银河的乐队。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。