1·The first artificial satellite.
第一颗人造卫星。
2·The life of an artificial satellite.
人造卫星的寿命。
3·Do you know when the first artificial satellite of America was launched?
你知道美国的第一颗人造卫星是什么时候发射的吗？
4·The orbit of the artificial satellite has an apogee of 200 miles from the earth.
这个人造卫星的轨道， 其最远点在离地球200英里的地方。
5·The orbit of the artificial satellite has an apogee of 200 miles from the earth.
这个人造卫星的轨道，其最远点在离地球200英里的地方。
6·Since 1957 the Soviet Union launched the first artificial satellite, the space age has begun.
自从1957年苏联发射了第一颗人造卫星，人类的空间时代就拉开了序幕。
7·Accurate measurement of the orbit parameters of the artificial satellite was provided by radio and optical stations.
人造卫星的精确轨道参数将由无线电和光学观测站测量得出。
8·Rocket propellant has barely changed in the more than 50 years since the launch of the first artificial satellite Sputnik.
自第一颗人造卫星史泼尼克发射以来，火箭推进剂在超过50年的时间内变化不多。
9·First artificial satellite launched fr Earth. Sputnik I is orbited by the Soviet Union, arking the dawn of Earth's Space Age.
第一颗人造卫星，苏联制的“史普尼克一号”从地球上发射开始轨道运行，为地球的太空世纪开启了曙光。
10·The shape and perigee of artificial satellite orbits shall continually variate due to caused by the atmospherical drag and the earth gravity.
人造地球卫星的轨道由于大气阻力和地球引力场等因素的摄动，其形状和近地点位置将不断改变。