| 单词 | 大行星 |
| 释义 | 〔MACHO〕Any of various massive dark objects, such as a brown dwarf star or large planet, in the outermost regions of a galaxy, that may explain the observed anomalous rotation of most galaxies.天体紧密光圈物体：在银河系远程的各种巨大黑色物体，如棕色矮星或大行星，可对观测到的多数银河系不规则自转做出解释〔Saturn〕The sixth planet from the sun and the second largest in the solar system, having a sidereal period of revolution about the sun of 29.5 years at a mean distance of about 1,425,000,000 kilometers (886,000,000 miles), a mean diameter of approximately 119,000 kilometers (74,000 miles), and a mass 95 times that of Earth.土星：距太阳第六远的行星，是太阳系中第二大行星，绕日公转周期29.5年，公转平均半径约1,425,000,000公里(886,000,000英里），平均直径大约119,000公里(74,000英里），质量是地球的95倍 |
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