1 . 愉快
journeyman 技师joviality愉快joy 快乐
2 . 快活
jovial 快活的joviality快活jovially 愉快地
3 . 愉悦性
IV . it discussed the application of aesthetic ideas in class and it summarized the four principles : jovialityprinciple , harmony principle , rhythmicity principle and substantial principle .论述了审美理念在课堂中的应用,概括了四种原则:愉悦性原则,和谐性原则,节奏性原则,充实性原则。