| 单词 | rocket sled |
| 释义 | rocket slednouna sled propelled along a long track by rocket engines, for testing the effects of high rates of acceleration and deceleration. Origin of rocket sledFirst recorded in 1950–55 Words nearby rocket sledrocket propulsion, rocketry, rocket science, rocket scientist, rocket ship, rocket sled, rocketsonde, Rockeye, rockface, rock-faced, rockfall Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 |
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