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As the essential material to make medical masks, melt-blown nonwoven fabric is the filtering layer in the middle part of the mask.
As the demographic of farmers in Liu’s hometown is aging, some reaching their seventies, he said that the invention is more about improving the efficiency of agricultural work rather than taking people’s jobs.
As the chase continued, both vehicles eventually crashed into walls or barricades, though the four occupants of the second vehicle got out and continued to fire on the marines until they were killed.
As the White House announced that most people on its grounds wear face masks, US President Donald Trump on Monday praised his administration's response to the coronavirus pandemic, saying "we have met the moment, and we have prevailed" on testing.
As the summer continues, the risk of large wildfires is set to reach normal levels in much of the Southwest and Rocky Mountain areas, thanks to strong summer rains, but risk levels will remain above normal in California through at least October, according to NIFC data.
来源：资阳报