The theory for exploring the moon time after time through double lunar swingby is analyzed at first.

分析了双月球近旁转向实现对月球测原。

After completing lunar swingby maneuvers, the A spacecraft is intended to orbit the Sun "Ahead" of planet Earth, and the B spacecraft "Behind".

成对测器变轨后，A飞船将地球前方绕行太阳，而B飞船则"后方"绕行。