play.ground
n.(名词)An outdoor area set aside for recreation and play, especially one containing equipment such as seesaws and swings.操场:用于消遣和玩耍的户外场地,尤指提供,如跷跷板和秋千等设备A field or sphere of unrestricted pleasurable activity:休养胜地:自由享乐活动的场所或范围:例句:.Foreign affairs had been T.R.`s personal playground during his Presidency.(John Dos Passos).外交事物曾是T.R.在他的总统任期内的个人喜好.(约翰·道斯·帕索斯)