retrorocket
/ˈretrəʊˌrɒkɪt/noun
- a small auxiliary rocket on a spacecraft or missile, fired in the direction of travel to slow the craft down, for example, when landing on the surface of a planet制动火箭, 减速火箭。
| 单词 | retrorocket |
| 释义 | retrorocket/ˈretrəʊˌrɒkɪt/noun
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