L must spare no efforts to do my bit

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? 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 pains to spare no efforts spare no expense spare no effort 和 spare no efforts的区别 求spare no effort和spare no expense造句 spare no efforts什么意思 形容词spare和动词to spare的区别9：45之前回答,急用!级别小,没分,望谅解注意以下句子l cannot spare the time.我花不起时间l have no time to spare我没有时间l cannot buy spare parts foe this car.我买不起这辆车 I always love you with spare no spare no pains和spare no effort有什么区别?spare no pains,spare no effort,和take pains三者有什么区别? spare spare 是spare no effort to do还是spare no efforts to do? can l go in?no,you can,t.you must stay away from the building.