But questions remain about how realistic the goal and timeframe are, given recent and steep Nasa budget cuts, and some scientists are concerned that the plans are driven by geopolitical goals.
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// 步骤3：计算最终能看到的人数
Цены на нефть взлетели до максимума за полгода17:55，推荐阅读WPS官方版本下载获取更多信息