"Effort" 是努力的名词，读音是 [ˈefərt]。这个词来源于中世纪拉丁语“exfortare”，意思是"to exert oneself"。
例句：
He made a great effort to finish the project on time. (他竭尽全力完成了项目。)
Despite her efforts, she couldn't pass the exam. (尽管她努力了，但她还是没能通过考试。)
We should all make an effort to reduce our carbon footprint. (我们应该全力以赴减少我们的碳足迹。)