| 单词 | 天体之间 |
| 释义 | 〔heliometer〕A telescope equipped to measure small angular distances between celestial bodies.量日仪：一种望远镜，用以测量天体之间微小的角距离〔elongation〕The angular distance between two celestial bodies as seen from Earth.距角：从地球上看的两个天体之间的角距离 |
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