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关注：1
2013-05-23 12:21
求翻译：The challenge of improving the vacuum performance of these main engines has led to the concept of altitude compensating nozzles aimed at closing the gap between the present and ideal engines. Various concepts have been discussed in the past and tested on the ground.是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
The challenge of improving the vacuum performance of these main engines has led to the concept of altitude compensating nozzles aimed at closing the gap between the present and ideal engines. Various concepts have been discussed in the past and tested on the ground.
问题补充： |
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2013-05-23 12:21:38
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2013-05-23 12:23:18
面临的挑战是改善性能的真空度,这些主要引擎导致了概念中的“海拔高度补偿喷嘴旨在之间的差距存在和理想的发动机。 各种概念已经讨论了在过去和测试在地面上。
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2013-05-23 12:24:58
改进这些主要引擎真空表现的挑战导致了高度补偿的喷管的概念瞄准缩小当前和理想的引擎之间的空白。 各种各样的概念从前在地面被谈论了并且被测试了。
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2013-05-23 12:26:38
提高真空性能的这些主要引擎挑战导致了高度补偿喷嘴旨在缩小差距的存在和理想引擎的概念。各种各样的概念，已在过去讨论并在实地测试。
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2013-05-23 12:28:18
正在翻译，请等待...
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