航海航天行业专业英语第755页 ... aperture synthesis 孔径综合 apex of earth's motion 地球（运动）向点 aphelic conjunction 远日点合 ...
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由于月球阻碍了与探测器的直接无线电通信，中国首先必须把一颗人造卫星送入月球轨道上的一个点，人造卫星可以从那里向航天器和地球发射信号。
Because the moon's body blocks direct radio communication with a probe, China first had to put a satellite in orbit above the moon in a spot where it could send signals to the spacecraft and to Earth.
如果地球的位置向旁边倾斜一点——像天王星一样，那么在夏至这天太阳会以更美的姿态出现在北极的天空中。
If the Earth were flipped sideways - like Uranus - the sun would be pretty much overhead at the North Pole on the June solstice.
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