| 词汇 | planet |
| 词根词缀 | 词源： late O.E., from O.Fr. planete (Fr. planète), from L.L. planeta, from Gk. (asteres) planetai "wandering (stars)," from planasthai "to wander," of unknown origin. So called because they have apparent motion, unlike the "fixed" stars. Originally including also the moon and sun; modern scientific sense of "world that orbits a star" is from 1640. 词根记忆： n. 行星In the lane the planer saw a planet airplane under the crane.在巷道里,刨工看见了起重机下的行星飞机. |
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