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单词 agena
释义

WordReference Random House Unabridged Dictionary of American English © 2024
A•ge•na  (ə jēnə),USA pronunciation n. [Rocketry.]
  1. Rocketrya U.S. upper stage, with a restartable liquid-propellant engine, used with various booster stages to launch satellites into orbit around the earth and send probes to the moon and planets: also used as a docking target in the Gemini program.

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更新时间:2025/7/23 13:21:09