Definition
To exert the maximum effort possible in attempting to achieve something.
尽力而為
I will do my very best to complete this task, hoping to meet your expectations.
我會盡我最大的努力完成這項任務，希望能達到你的期望。
Despite the difficult circumstances, he tried his best to remain calm.
儘管處境艱難，他還是盡力保持冷靜。
Every student should do their best to achieve good grades on the exam.
每個學生都應該盡力在考試中取得好成績。