"Space regulations don't cover the new problems emerging - interference with astronomical observations, risk of collision in orbit, risk of stuff falling on our heads, and now it is becoming clear, atmospheric pollution," says Andy Lawrence, Professor of Astronomy at the University of Edinburgh.
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新冠疫情爆發之後，數以萬計的中國人從中國出發，抵達中南美洲的國家之後，再歷險到達美墨邊境、非法進入美國境內，並在入境後尋求庇護。這種偷渡方式被稱為「走線」。