Jay nodded, his smile fading.是什么意思？

Jay nodded, his smile fading.

杰伊点点头，笑容慢慢隐去了。

jay

n. 松鸦，过分多嘴的人，喋喋不休的人；

例句
She should have squared things with Jay before she went into this business with Walker.
她本该在和沃克联手进入这一行之前先征得杰伊的同意。

nodded

v. 点头( nod的过去式和过去分词 )，打盹，打瞌睡，点头致意；

例句
Mitzi nodded a perfunctory acknowledgement as her glass was filled.
杯子被倒满时米芝敷衍性地点头示意。

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

smile

n. 微笑，笑容；vt. 以微笑表示，以微笑完成；vi. 微笑，赞许，不在乎；

例句
He answered her smile with one of his own...
他对她的微笑回以同礼。

fading

n. 褪色，枯萎，衰退；v. （使）褪去( fade的现在分词 )，逐渐消逝，逐渐消失，（运动员、运动队、演员等）走下坡路；

例句
They can withstand extremes of temperature and weather without fading or cracking.
它们能够经受极端的气温和天气状况而不褪色、不破裂。