manned spaceflights were successfully conducted
...uman spaceflights chronologically 载人航天飞行列表 Manned spaceflights were successfully conducted 载人航天飞行成功实现 Lists of spaceflights by year 航天年表 ..
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manned spaceflights were successfully conducted
载人航天飞行取得成功
以上为机器翻译结果，长、整句建议使用 人工翻译 。