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two stage to orbit 两级入轨
Key Words Recoverable launch vehicle,Single stage to orbit vehicle,Reentry trajectory. 主题词重复使用运载火箭，单级入轨运载器，再入弹道。
Air-breathing hypersonic vehicle(AHV) has been the next generation single stage to orbit vehicle and hypersonic cruise vehicle. 吸气式高超声速飞行器是下一代单级入轨和高超声速巡航研究的重点飞行器。
A caterpillar must pass through the cocoon stage to become a butterfly. 毛毛虫必须经过茧的阶段才能变成蝴蝶。
Generally it goes through two stages to convert steel ingots into rolled steels by rolling. 一般说来，把钢锭轧制成钢材要经过两个阶段。
The PBT (passband tuning) function narrows and moves the IF passband at two stages to efficiently eliminate interfering signals. 该聚对苯二甲酸丁二醇酯（通微调）函数缩小和动作，如果通在两阶段进行，有效地消除干扰信号。
This asteroid takes 238 years to orbit the sun. 这颗小行星需要花238年绕太阳运行一周。
The earth takes a year to orbit the sun. 地球绕太阳一周要一年的时间。
Jr. was the first American to orbit the earth. 是第一位沿地球轨道绕行的美国人。
Basing and supportability requirements for single stage to orbit vehicles 单级入轨飞行器的基本要求和承载能力要求
The evacuation was to be carried out in two stages. 整个移民安置计划分两个价段进行。
Review of the Development Way for Rocket Vehicle of Single Stage to Orbit 论单级入轨火箭运载器的发展途径
HE SLOUCHED onto the stage to light applause. 他无精打采地走上台，台下掌声稀落。
Invites Bill back on stage to demo the game. 邀请比尔回到台上演示这款游戏。
She walked onto the stage to claim her prize. 她走上台领了奖。
The actors went on the stage to great applause. 这名演员一上台就赢得了热情的掌声。
The viewer uses a viewer sorter to sort its elements in two stages. 查看器使用查看器排序程序以便采取两个步骤对它的元素排序。
Everyone got up on stage to do a turn. 每个人都登台表演了一个小节目。
The Bretton woods system broke down in two stages. 布雷顿森林体系的垮台分为两个阶段。
He left the stage to prolonged applause. 他在经久不息的掌声中退下了舞台。