(adj.) in operation or operational; 'left the oven on'; 'the switch is in the on position' .
(adj.) (of events) planned or scheduled; 'the picnic is on, rain or shine'; 'we have nothing on for Friday night' .
(adv.) indicates continuity or persistence or concentration; 'his spirit lives on'; 'shall I read on?'.
(adv.) in a state required for something to function or be effective; 'turn the lights on'; 'get a load on'.
弗恩手打
手打:维吉尔