- a rocket engine that maintains the velocity of a space vehicle after the booster has been jettisoned
单词 | sustainer |
释义 | WordReference Random House Unabridged Dictionary of American English © 2024 sus•tain•er (sə stā′nər),USA pronunciation n.
Collins Concise English Dictionary © HarperCollins Publishers:: susˈtainer /səˈsteɪnə/ n
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