与 (4: os 一样，(4: os 非常精致和优雅。####[['(4: os', 'OS#OPERATION_PERFORMANCE', 'positive'], ['(4: os', 'OS#OPERATION_PERFORMANCE', 'positive'], ['os', 'OS#OPERATION_PERFORMANCE', 'positive'], ['os', 'OS#OPERATION_PERFORMANCE', 'positive']]