某星被月球的掩星现象出现在地球赤道的天顶上。
The grazing occultation of the star by the Moon is observed in the zenith at the Earth's equator.
准确纪录掩星现象的时刻能提供有关行星大气，不同类型星体大小和准确的位置。
The precise timings of occultations provide information about planetary atmospheres , the dimensions of extended visible , radio , and x - ray objects , and the positions of objects.
这一现象表明七星瓢虫在高山地区具有夏季生存能力和垂直迁移能力。
This phenomenon indicates that Coccinella septempunctata survives the summer in the upper mountain area and can migrate vertically.
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