adj.欣喜的;高兴的;令人愉快的;
例句:
All a sudden, Alice had a gleeful look in her eye.
忽然, 爱丽丝眼中闪现出兴奋的眼神.
I had not seen my father so gleeful.
我从来没见过他这样高兴过.
He had a naughty schoolboy's gleeful disregard for rules.
他有顽皮小学生一样的对于无视规则的欣喜.