全心全意 wholeheartedly
Explanation
指付出全部精力，毫无保留地投入。形容态度认真，尽心尽力。
Means to invest all one's energy and without reservation. Describes a serious, dedicated attitude.
Origin Story
从前，在一个偏远的小山村里，住着一对善良的夫妇。他们只有一个儿子，名叫小明。小明从小就非常懂事，学习认真刻苦，对父母也孝顺有加。长大后，小明考上了大学，学习了一门非常有用的专业。毕业后，他放弃了留在城市里高薪工作的机会，毅然决然地回到了家乡，决心为家乡的发展贡献自己的力量。他全心全意投入到家乡的建设中，废寝忘食地工作，带领乡亲们一起修建道路，改善水利设施，发展特色产业，村里的人们日子过得越来越好。几年后，小山村发生了翻天覆地的变化，成为远近闻名的文明村。小明用自己的实际行动，诠释了全心全意的含义。
Once upon a time, in a remote mountain village, there lived a kind couple. They had only one son, named Xiaoming. Xiaoming was very sensible from a young age, studied diligently, and was filial to his parents. After he grew up, Xiaoming went to university and studied a very useful major. After graduation, he gave up the opportunity to work in a high-paying job in the city and resolutely returned to his hometown, determined to contribute his strength to the development of his hometown. He devoted himself wholeheartedly to the construction of his hometown, worked tirelessly, led the villagers to build roads, improve water conservancy facilities, and develop characteristic industries. The villagers' lives were getting better and better. A few years later, the small mountain village underwent a tremendous transformation and became a well-known civilized village. Xiaoming used his actions to interpret the meaning of wholeheartedly.
Usage
通常作谓语、状语，表示尽心竭力，全力以赴。
Usually used as predicate or adverbial, expressing dedication and full effort.
Examples
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他全心全意投入工作，取得了显著的成绩。
tā quán xīn quán yì tóurù gōngzuò, qǔdé le xiǎnzhù de chéngjī
He devoted himself wholeheartedly to his work and achieved remarkable results.
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为了完成这个项目，我们必须全心全意地合作。
wèile wánchéng zhège xiàngmù, wǒmen bìxū quán xīn quán yì de hézuò
To complete this project, we must cooperate wholeheartedly.