the successful launch and return of the manned spacecraft shenzhou iv is deemed both a symbol of national prestige and a sign of advanced science and technology which will definitely contribute to the economic growth of our country
神舟四号载人飞船的成功发射和返回被认为既是国家威望的象征，也是先进科学技术的标志，这必将有助于我国的经济增长
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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