Lunar eclipses occur when the sun, Earth and moon sit in alignment and the Earth blocks sunlight from reaching the moon.
当太阳、地球和月球成一直线且地球遮挡了太阳照到月球上的太阳光。
A total lunar eclipse also occurs when the sun, Earth and moon are almost exactly in line, leaving the full moon appear much dimmer than usual.
而太阳、地球和月亮又几乎处于一条线上，月全食出现，导致满月比往常晦暗许多。
STEREO, a two-year mission that launched October 2006, provided a unique and revolutionary view of the Sun-Earth System.
是一个为期2年的任务，它于2006年10月发射，给我们提供了独特的和创新性的视角来观察太阳-地球系统。
Sun, earth, moon, water, wind; you.
太阳，地球，月亮，水，风；你。
If you had looked down upon the solar system on August 14, you would have seen the sun, Earth and Jupiter making a straight line in space.
8月14日那天，如果从外太空俯瞰太阳系，太阳、地球和木星刚好形成一条直线。
Scorching sun, earth like steamer, hot people breathless.
烈日似火，大地像蒸笼一样，热得使人喘不过气来。
The dynamics of the Earth-Moon system is quite different from the Sun-Earth system especially after a long duration for the gravitational attraction of the Sun.
由于在地-月系统中太阳的引力不可忽略，特别是在长时间作用以后，其动力学行为与摄动力较小的日-地系统有明显的不同。
China will carry out basic research into sun-earth space environment, space climate, and solar activity and its impact on space climate, and implement space-related interdisciplinary research as well.
开展日地空间环境、空间天气、太阳活动及其对空间天气影响等领域基础研究。开展空间科学交叉学科研究。
Another characteristic of the sun-earth system is the gradual procession 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。
Another characteristic of the sun-earth system is the gradual procession 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。
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