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https://yuyencia.org/2017/01/25/%e6%95%99%e5%ae%97%e6%89%8b%e8%b0%95%e3%80%8a%e5%8e%86%e4%bb%bb%e6%95%99%e5%ae%97%e3%80%8bsummorum-pontificum/
教宗手谕《历任教宗》Summorum Pontificum