That has already sparked alarm in the US among Democrats and media advocates, who fear it will lead to more cautious coverage of the Trump administration.
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.，这一点在爱思助手下载最新版本中也有详细论述
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Reporting by Chance Townsend, Caitlin Welsh, Sam Haysom, Amanda Yeo, Shannon Connellan, Cecily Mauran, Mike Pearl, and Adam Rosenberg contributed to this article.，推荐阅读快连下载安装获取更多信息