天文

Since different people like to do so many different things in their spare time, we could make a long list of hobbies, taking in everything from collecting matchboxes and raising rare fish, to learning about the stars and making model ships.

由于不同的人在各自的业余时间里所做的事差别很大，所以我们可以列出各种各样的爱好，其中既包括收集火柴盒和喂养珍稀鱼类，也包括研究天文和制作模型轮船。

The two sanctuaries consist of circles of menhirs arranged in a pattern whose astronomical significance is still being explored.

这两个圣地地糙石巨柱均呈现出特定的圆形形式，然而科学也还在探讨其中所象徵的天文意义。

"Thanks to advances in computer power, since the 1990's we have been able to predict these upswings in activity," said William Cooke, head of NASA's Meteoroid Environment Office."This year there is going to be a Leonid strong outburst , where the rates may race up to 300 per hour," Cooke said.

&感谢计算的发展，从1990年开始我们就能预测到这些天文现象，&NASA流星体研究办公室负责人William Cooke这样说，今年将是狮子座流星群的一次大爆发，其数量可达到一小时300颗左右。

Astronomical yearbooks and calendars for amateur astronomers provide the times of the beginning of the synodic solar rotations as well as the longitudes Lo.

天文年历和日历为业余天文学家提供了太阳会合自转周期的始时和经度Lo。

The conclusion is that the extent of the zenith blind zone was restricted by three parameters: maximum azimuth angular velocity of tracking mount, flight level and airspeed of the target. In astronomical coordinates (reference mark is north latitude 43. 9°), analyzed is the effect of azimuth angular velocity, acceleration and altitude angular velocity, acceleration etc. Some formulae were given to compute all correlative quantities.

在观测坐标系中推导出确定天顶盲区理论范围公式和满足过天顶跟踪条件的关系式；在天文坐标系中以长春卫星观测站（北纬43.9°）作为计算基准，分别讨论了方位、俯仰方向的角速度、角加速度等对天顶盲区的影响，在理论分析上为解决过天顶跟踪问题打下了基础。

The conclusion is that the extent of the zenith blind zone was restricted by three parameters: maximum azimuth angular velocity of tracking mount, flight level and airspeed of the target. In astronomical coordinates (reference mark is north latitude 43.9 ), analyzed is the effect of azimuth angular velocity, acceleration and altitude angular velocity, acceleration etc. Some formulae were given to compute all correlative quantities.

在观测坐标系中推导出确定天顶盲区理论范围公式和满足过天项跟踪条件的关系式；在天文坐标系中以长春卫星观测站(北纬43.9°)作为计算基准，分别讨论了方位、俯仰方向的角速度、角加速度等对天顶盲区的影响，在理论分析上为解决过天顶跟踪问题打下了基础。

The oldest known Feng Shui device consists of a two-sided board with astronomical sightlines.

至今所知的最古老风水设备是由一块双面的木板组成，上面带有天文视线。

Good Luck And Clearskies!Good Luck And Good Seeings !

牧夫官方淘宝店拥有各种优质望远镜和天文器材！

Historic significance, elegant and implicit expression way, self-confident imposing manner and abundant aesthstic thought with deep language in Spring and Autumn Period, and reflect knowledge stratum's astronomy, geography, the Book of Sangs and the Book of History, philosophy, history, etc.

春秋辞令深厚的历史意义、文雅含蓄的表达方式、自信的气势和丰富的美学思想，以及辞令中体现春秋知识阶层天文、地理、诗书、哲学、历史等文化修养，充分展示了春秋时代精神。

In a word, olive green porcelain are the main funeral objects, and the celestial phenomena design in the tombs has brightest characterist...

总体上，钱氏家族墓葬以秘色瓷为主要随葬品，特别是在墓内绘刻天文星象图，在同时期墓葬中具有鲜明的特色。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。