Last year a group of researchers from Nasa, the University of Plymouth and University of Texas called on the UN to include the protection of Earth's orbit in its sustainable development goals.
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'It's harder to be a parent than a space shuttle commander', trailblazing Nasa pilot tells BBC
母亲却表现出不悦:“你怎么总把人心想得那么坏?我学点新东西,发挥点余热,有什么不好?难道我什么都不做,你就高兴了?”
去年春节,我也遭到了同样的指责。我的记者手记发表时,我正在双流机场候机返京。妈妈打来电话说:“我没想到你是以如此冷漠和理性的笔触来写外公,感受不到一点你对他的温情。”她很不快,也很气愤。