Their faces became transfigured with joy.是什么意思？

Their faces became transfigured with joy.

他们的脸因高兴而容光焕发.

their

pron. 他（她，它）们的，在提及性别不详的人时，用以代替 him 或 her；

例句
Their permissiveness toward their children reflects the wild abandon of their own lives.
他们对孩子的放任折射出他们自身生活的放浪形骸。

faces

n. 面容( face的名词复数 )，表面，脸，方面；v. 面对( face的第三人称单数 )，面向…，正视，承认；

例句
Smiles, nods, and cheerful faces added to the general gaiety.
微笑、点头和喜洋洋的脸庞使喜庆的气氛变得更浓了。

became

v. 变为，成为（ become的过去式 ）；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

transfigured

v. 改变…的外表，美化，使变得高尚或理想( transfigure的过去式和过去分词 )；

例句
They are transfigured by the healing powers of art...
他们因艺术的治疗效力而面貌一新。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

joy

n. 高兴，喜悦，喜悦，成功；

例句
She had given him the only joy his arid life had ever known.
她为他枯燥无味的生活带来了从未有过的乐趣。