连词成句 space spent he about hours twenty-one in

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连词成句 space spent he about hours twenty-one in
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连词成句 space spent he about hours twenty-one in
连词成句 space spent he about hours twenty-one in

连词成句 space spent he about hours twenty-one in
He spent about twenty-one hours in space.
在太空他度过了大约二十一小时.