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protoplanet
释义
WordReference Random House Unabridged Dictionary of American English © 2024
pro•to•plan•et
(prō
′
tō plan′it),
USA pronunciation
n.
[
Astron.
]
Astronomy
the collection of matter, in the process of condensation, from which a planet is formed.
proto
- +
planet
1945–50
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更新时间:2026/9/18 1:16:48