| 单词 | sustainer |
| 释义 | sustainer /seuh stay"neuhr/, n. 1. a person or thing that sustains. 2. Rocketry. a. any stage of a multistage rocket or guided missile that sustains flight after the burnout of the booster. b. the rocket engine or cluster of engines contained in such a stage. [1350-1400; ME sosteynere. See SUSTAIN, -ER1] |
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