heart and soul
US /hɑːrt ənd soʊl/
UK /hɑːrt ənd soʊl/

1.
全心全意, 全身心投入, 徹底地
with all of one's energy and dedication; completely
:
•
She put her heart and soul into her painting.
她把全部心血都投入到繪畫中。
•
He devoted his heart and soul to the project.
他把全部心血都投入到這個項目中。