Asteroids, also known as " minor planets ", are numerous in the outer space.小行星, 亦称为 “ 小型行星 ”, 在外太空中不计其数.Most stars probably have their quota of planets, meteorids, comets, and asteroids.多数恒星也许还拥有若干行星 、 流星 、 彗星和小行星.The o...
The orbits of such faint asteroids are not yet known.但是对于这样暗的小行星的轨道,迄今尚未弄清.Asteroids,also known as “minor planets”,are numerous in the outer space.小行星,亦称为“小型行星”,在外太空中不计其数。Most stars probably have their quota of planets, ...
煤烟是燃料不完全燃烧的产物.Soot is the product of the imperfect combustion of fuel.煤烟通常是燃料不完全燃烧的产物.Soot is usually the product of the imperfect combustion of fuel.烟囱里面很快就覆盖了一层煤烟.The inside of a chimney soon gets covered in soot....