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X-37B近年来的一系列成功发射和返回标志着美国在小型、无人驾驶、可重复使用航天器技术领域取得了重大进展,为其进一步改进并最终达到实用化打下了坚实的基础
A series of successful launches and returns of the X-37B in recent years have marked the United States’ significant progress in the field of small, pilotless and reusable spacecraft, laying a solid foundation for its further improvement and eventually its practical application