Joey玖玖
spare no effort.不需要加s，因为effort是不可数名词。spare no effort英文发音：[speə(r) nəʊ ˈefət]中文释义：不遗余力;不惜血本;竭尽
CYGUANGZHOU
努力的英文单词是：effort， endeavor，Strive。strive的英式发音为 [straɪv] ，美式发音为[straɪv]。意思有：努力奋斗，力求，斗争，力争。endeavor的英式发音为[ɪn'devə] ，美式发音为[ɪn'devə]。意思有：尝试，试图，尽力，竭力。
拓展资料
effort
1、He made no effort to hide his disappointment
他毫不掩饰失望之情。
2、She took a deep breath and sat up slowly and with great effort
她深吸一口气，费力地慢慢坐起身来。
3、Even carrying the camcorder while hiking in the forest was an effort.
在森林中徒步旅行时，即便带的是便携式摄像机也非常费力。
endeavor
1、We made an earnest endeavor to persuade her.
我们郑重其事地努力说服她。
2、I shall endeavor to do my duty.
我将恪尽本分。
3、We are very successful in this endeavor.
我们的努力获得了极大的成功。
4、There is no more important partner for India in this endeavor than the United States.
对印度来说，在这一努力中没有比美国更为重要的伙伴了。
Strive
1、He strives hard to keep himself very fit
他努力地保持身体健康。
2、She strove to read the name on the stone pillar
她费劲地读着石柱上的名字。
3、Mr Annan said the region must now strive for economic development as well as peace.
安南先生说该地区现在必须为经济发展与和平而奋斗。
