body and soul：全神贯注、竭尽全力、全心全意

with complete faith

例句：

We must serve the people body and soul.

我们必须全心全意地为人民服务。

Count on me to help you heart and soul.

相信我会全心全意地帮助你。

She committed herself body and soul to fighting for the cause.

她全心全意为这一事业而奋斗。

拓展学习：body相关的习语

1.keep body and soul together 勉强糊口、生活拮据

They barely have enough money to keep body and soul together.他们仅有活命的钱。