| 单词 | Hipparchus |
| 释义 | Word Frequency Hipparchus 1(hɪˈpɑːkəs) noun 1. 2nd century bc, Greek astronomer. He discovered the precession of the equinoxes, calculated the length of the solar year, and developed trigonometry 2. died 514 bc, tyrant of Athens (527–514) Word Frequency Hipparchus 2(hɪˈpɑːkəs) noun a large crater in the SW quadrant of the moon, about 130 kilometres in diameter |
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