the light of somebody’s life
US /ðə laɪt əv ˈsʌmˌbɑdiz laɪf/
UK /ðə laɪt əv ˈsʌmˌbɑdiz laɪf/

1.
某人生命中的光
a person who is extremely important to someone and makes them feel happy and complete
:
•
His granddaughter is the light of his life.
他的孙女是他生命中的光。
•
After they adopted the child, she became the light of their life.
他们收养孩子后,她成了他们生命中的光。