以液氢和液氧为燃料的火箭将为宇航员登陆月球提供尤其重要的有利条件。
Using liquid hydrogen and oxygen in rockets will provide major advantages for landing astronauts on the moon.
新一代航天工具的设计采用了运载火箭部件、和“阿波罗”号类似的太空舱和一个能够搭载四名探月宇航员的登陆舱。
The new space vehicle design USES shuttle rocket parts, an Apollo-style capsule and a lander capable of carrying four people to the moon.
阿姆斯特朗和奥尔德林点燃了登月舱火箭引擎，喷火降低了登月舱速度并把它向下朝着登陆地点，登陆点在一个被称为“静海”的区域里。
Armstrong and Aldrin fired the lander rocket engine. The firing slowed the spacecraft and sent it down toward the landing place. It was in an area known as the Sea of Tranquility.
计划需要在2015年建设一艘名为“猎户星”号的新太空船来取代现在的航天飞机，加上两枚火箭和一辆月球登陆车。
Plans call for the construction of a new crew capsule called Orion to replace the space shuttle in 2015, plus two rockets and a lunar lander.
不载人火箭已经登陆在比月球更远的别的星球上。
Several rockets without men in them have flown to another planet much farther away than the moon.
1969年，一艘土星5号火箭发射了阿波罗11号任务，人类首次登陆月球。
Saturn Five launched the Apollo 11 mission that landed the first humans on the moon in nineteen sixty-nine.
迄今，中国长征系列火箭已将美国、澳大利亚、巴基斯坦等国的20多颗卫星送入太空。中国的一名年轻志愿者正在参与一项多国科学家合作进行的人类首次登陆火星模拟实验。
So far China's Long March rocket series has successfully sent more than 20 satellites into space for the United States, Australia, Pakistan and other countries and regions.
靠着钢铁和混凝土，他们做出了优异的桥梁、汽车、摩天大楼和登陆月球的火箭，让使用者深感满意。
Working in steel and concrete, they made Bridges, cars, skyscrapers and moon rockets that worked well and satisfied their human users.
靠着钢铁和混凝土，他们做出了优异的桥梁、汽车、摩天大楼和登陆月球的火箭，让使用者深感满意。
Working in steel and concrete, they made Bridges, cars, skyscrapers and moon rockets that worked well and satisfied their human users.
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