I'll spare no effort to change OUR grey world into a colourful one.

问题描述:

I'll spare no effort to change OUR grey world into a colourful one.
spare no effort to 是不遗余力还是不努力的意思,请指教.

就是不遗余力的意思
整句话:我将不遗余力的把我们灰暗的世界变得色彩斑斓.