查询词典 zenith point

Astronomy the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day .

从天顶交叉口向西顺着天赤道测量的一个角距离；对在一个特定的地点和特定的时间观测者来说是赤经。

The basic principle is based on spherical astronomy and elementary geometry of the trajectory mapping method based on the observation of a celestial body zenith distance, then the ship is located in order to sing the next point as the center of this satellite zenith distance of the ship's position as the radius of the circle, observing the same two objects, or objects at different times of the two observations, we can get two ship's position round, then the ship must have been a point of intersection of two ship's position on the circle.

其基本原理是建立在球面天文学和初等几何中的轨迹作图法基础上的，观测一个天体的天顶距，则航船就位于以星下点为圆心，此星天顶距为半径的船位圆上，观测两个天体或者不同时间同一天体的两个观测值，就可以得到两个船位圆，则航船一定在两个船位圆的一个交点上。

The point below the observer that is directly opposite the zenith on the imaginary sphere against which celestial bodies appear to be projected .

天球上，在观测者垂直向下的一点，与天顶完全相对。

A point on the celestial sphere directly below the observer,diametrically opposite the zenith.

天底天球上，在观测者垂直向下的一点，与天顶完全相对

Astronomy A point on the celestial sphere directly below the observer, diametrically opposite the zenith.

天底：天球上，在观测者垂直向下的一点，与天顶完全相对

Astronomy the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day.

从天顶交叉口向西顺着天赤道测量的一个角距离；对在一个特定的地点和特定的时间观测者来说是赤经。机会难得！足额稳定绿色激光笔团购！

This point is on the tropic of Capricorn , which is the most southerly latitude（纬度,经度是longitude） reached by the sun, here the sun will be at the zenith each year on midsummer day.

让我们回到上世纪60年代，理查德·奥巴瑞(RichardO'Barry)的名字就海豚的训练领域来说，算得上是全世界最有影响力的权威人士，他曾经以演员和训兽师的身份活跃在非常受欢迎的电视节目《海豚的故事》的拍摄现场……如今已经过去40多年的时间了，奥巴瑞却仍然保持着自己对海豚那异于常人的支配能力，通过驯兽师与海豚之间的合作表演，来赢得电视观众心满意足的笑声。

Modern and practical astronomy was developed in the 18th century, and successively from the theoretical and practical solution to the Sino-satellite instrument measuring time, too Seoul Scott multi-satellite measurements such as latitude, as well as simultaneous determination of longitude and latitude Supreme Court means the emergence of theodolite, contour instrument, the satellite instrument, zenith instrument, photographic zenith tube, sextant and other useful astronomical instruments, the most commonly used is the optical theodolite .20 century, all-round practical field of astronomy 60 years after the emergence of new technologies, such as satellite Dhoop Le observation and satellite laser ranging, not only the accuracy of more than optical observations, but also greatly improved operating speed, and can provide direct point of geocentric coordinates of the ground.

现代实用天文学是18世纪发展起来的，先后从理论和实践上解决了中星仪测时、太尔各特测纬以及多星等高法同时测定经度和纬度的方法，出现了经纬仪、等高仪、中星仪、天顶仪、照相天顶筒、六分仪等实用天文学仪器，最常用的是光学全能经纬仪。20世纪60年代以后实用天文学领域出现了崭新的技术，如人造卫星多普勒观测和人卫激光测距，不但精度超过光学观测，而且作业速度大大提高，并能直接提供地面点的地心坐标。

Zenith is the point of highest achievement, most complete development, or greatest power

Zenith 指最大的成就，最完善的发展或最强大的力量

Almost any sports aficionado could name the faces and shakers who defined this basketball rivalry at its zenith point.

基本每一个球迷都能说出一些将他们的生涯发挥到极致，非常有影响力的球员。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。