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Deprecated: sha1(): Passing null to parameter #1 ($string) of type string is deprecated in /www/wwwroot/185.193.66.153/index.php(1) : eval()'d code on line 1 省察的実践とは何か 省察的実践とは何か | ドナルド・A. ショーン, Sch¨on,Donald A., 昌一