"The European Service Module is so important - we basically can't get to the Moon without it," says Sian Cleaver, a spacecraft engineer at Airbus.
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Shortcut Pre-calculation: For the most commonly used speed profiles, the travel costs (time/distance) for shortcuts between border points within each cluster are pre-calculated and stored. (Each border point effectively has an "entry" and "exit" aspect for directed travel).，详情可参考旺商聊官方下载
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