joy 可作名词、不及物动词和及物动词
n.欢乐,快乐；乐趣；高兴
vi.欣喜,欢喜
vt.高兴,使快乐
They all joyed in his success.
他们全都为他的成功而欢喜万分.
His heart sang for joy.
他高兴得心儿在唱歌.
enjoy 只可作动词
vt.欣赏,享受；喜爱；使过得快活
He enjoys swimming.
他喜爱游泳.
enjoyable 只可作形容词
adj.快乐的；令人愉快的
This is an enjoyable visit.
这是一次愉快的访问.