将两句合成一句:Several coutries have sent up spaceships.The spaceships mainly useelectronis controls..Several countries have sent up spaceships()mainly use electronic cintrols.
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![将两句合成一句:Several coutries have sent up spaceships.The spaceships mainly useelectronis controls..Several countries have sent up spaceships()mainly use electronic cintrols.](/uploads/image/z/13182311-47-1.jpg?t=%E5%B0%86%E4%B8%A4%E5%8F%A5%E5%90%88%E6%88%90%E4%B8%80%E5%8F%A5%EF%BC%9ASeveral+coutries+have+sent+up+spaceships.The+spaceships+mainly+useelectronis+controls..Several+countries+have+sent+up+spaceships%28%29mainly+use+electronic+cintrols.)
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