是spare no effort to do还是spare no efforts to do?

是spare no effort to do还是spare no efforts to do? 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 effort to do sth 是固定用法吗? spare no efforts in dong 与to do区别 I feel I must spare no efforts to do my L must spare no efforts to do my bit We must spare no effort to do it. spare no effect还是spare no effort? spare no effort 和 spare no efforts的区别 Ishod spare no effort to love I feel I must spare no efforts to do my bit.