1.
Many countries have sent up man made satellites to circle the earth.
许多国家发射了人造卫星围绕地球飞行。
2.
American manufacturer of breakfast cereals and the coffee-substitute Postum.
波斯特，韦雷1899－1935美国航天家，是首次单独绕地球飞行的飞行员（1933年）
3.
1961 Soviet cosmonaut Yuri Gagarin made one orbit in Vostok 1 and safely returned to earth.
苏联宇航员尤里·加加林乘坐宇宙飞船"东方1号"围绕地球飞行一周，安全返回地球。
4.
A similar system is used to contact the communications satellites that now continually encircle the earth.
人们正把同样的系统用来与目前绕地球飞行的通讯卫星保持联系。
5.
It is in this sense that an astronaut orbiting the earth in a space capsule is said to be "weightless".
就在这种意义上，宇宙飞行员在宇宙密闭小舱里，环绕地球飞行时被说成是“失重”了。
6.
The instruments have shown that albatrosses are capable of astonishing feats of endurance and navigation, and can fly round the world several times without stopping on land.
这一跟踪仪器还表明，信天翁有极强的耐力和航海能力，能够绕地球飞行几圈而不着陆。
7.
The spacecraft rounded the moon.
宇宙飞船环绕月球飞行。
8.
The spaceship orbited the moon.
宇宙飞船绕月球运行。
9.
to describe a craft that would orbit the Earth and return astronauts home.
这艘飞船将绕地球 轨道飞行并将宇航员送回地球。
10.
When travelling in space or orbiting round a planet, the feeling of weight which the force of gravity produces is gone.
在太空中飞行或绕行星飞行时，地球引力所产生的重量感会消失。
11.
The flight proved that a spacecraft could orbit the moon and return to Earth safely.
这次飞行证明了宇宙飞船可以环绕月球，并平安回到地球。
12.
The pilot managed to circle the balloon for some time.
这位飞行员设法绕气球飞了一阵。
13.
The moon orbits the earth.
月球绕地球轨道运行。
14.
The shuttle went into orbit on schedule to enable it to circle the earth at least once.
航天飞机已按预定时间进入轨道，从而使它至少能绕地球运行一周。
15.
The spacecraft is in orbit (ie moving in orbit) round the moon.
该航天器在绕月球轨道上飞行.
16.
How many spacecraft have orbited around the moon?
有多少宇宙飞船围绕月球轨道运行过？
17.
While he was sleeping, the spaceship circled the earth twice.
他睡觉时，太空船绕地球飞了两圈。
18.
After undocking the astronauts will fly around the Station one final time before returning to Earth Wednesday morning.
航天飞机脱离空间站后，宇航员们将绕太空站作最后的飞行，然后于周三早晨返回地球。