spare no efforts in dong 与to do区别

spare no efforts in dong 与to do区别 是spare no effort to do还是spare no efforts to do? I feel I must spare no efforts to do my L must spare no efforts to do my bit spare no effort 和 spare no efforts的区别 一个英语词组的疑惑,是to spare no efforts to do还是to spare no effort to 英语翻译不遗余力做什么事情的英语说法是spare no effort to do 还是 spare no efforts spare no efforts I feel I must spare no efforts to do my bit. i fell i must spare no efforts to do my bit意思 Spare No Efforts in Doing Things Concentration and persevera spare no efforts in doing everythings 是什麽意思?