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来源:雅诚德英语网
Last year the national program for playground safety gave the nation's playgrounds a grade of "C" for safety after visiting more than 3,000 playgrounds nationwide.
去年,国家游乐场安全计划在全国范围内走访了3000多个游乐场后,给国家游乐场的安全等级为“C”级。