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???????9?????????????????????20???? ????9???15??,???????????????????,????????????«???»(The Desert News)???????????????????17??????,???,?????,??????????????????

????????????????«?????????????????????????»??????

????,??????????????,??,???????????????????????????????20??60??,?????????????,???????

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???,?????,?,????????????????????????(University of Maryland)??????????????(START Center)???????????????????????????????(Gary LaFree)??????????:“???????????????????,?????????????????????21????????????????????????????????????????2015????2016????????(?)??????????”

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??,????????????????????????(Ryan Cowley)???,??2020??,????????????????29???????????????20??????????,?????????“???????”????????????????????????????,??:“?,??????????????????,??????(??????????????????????)?”

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