1、是effort的复数形式effort n.（名词）1. The use of physical or mental energy to do something; exertion.努力：耗费精神或体力来做某事；费劲2. A difficult exertion of the strength or will:费神的事。

2、困难的事：艰难地耗费精力或毅力：It was an effort to get up.起床是件费劲的事3. A usually earnest attempt:尽力：常指非常认真的尝试：Make an effort to arrive promptly.尽力早些赶到4. Something done or produced through exertion; an achievement:成就。

3、成果：通过努力而能做到的或做出的事；成果：a play that was his finest effort.一部可作为他的最佳成果的戏剧5. Physics Force applied against inertia.【物理学】 作用力：对惯性施加的一种力。