One of the key criteria for a planet to be habitable is that it remains roughly the right distance from its main star to be neither too cold nor too hot.
一颗行星是否宜居的关键标准之一是和主恒星的距离要适当，既不过冷，也不过热。
The dissertation takes the application of a star sensor in military area as background, and systematically studies and solves the above two key technology problems of the star sensor in practice.
论文以星敏感器在军事上应用为背景，系统地研究并解决了星敏感器在实用中面临的两大关键技术问题。
And the fifth angel sounded, and I saw a star fall from heaven unto the earth: and to him was given the key of the bottomless pit.
第五位天使吹号，我就看见一个星从天落到地上。有无底坑的钥匙赐给他。
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