scratched

Mars exploration has literally only scratched the surface of the planet, a few inches deep.

We have just scratched the surface in regards to what can be known about someone if you have their genetic code.

I'm not sure anyone has mastered it; ~50 years in, we've all just barely scratched the surface.

But the good news is that we haven't even scratched the surface of what current systems could theoretically accomplish.

Messages scratched across the server wall as though all the company had congregated outside this massive sleek black edifice where our words so glowed.

Also, even if Knuth manages to complete all of his planned volumes, it would still have scratched only tip of the tip of a iceberg.

Just recopy over the sheet by hand every few days without the scratched off items, and add in some new stuff that comes to mind.

I know my grandparents scratched and clawed their way for every penny they could earn/save to pay for my parent's/aunt's/uncle's educations.

Despite the benefits I've seen from it, I know I have only scratched the surface.

I don't work with my hands, but I'm clumsy; it's already a little scratched.

I should mention that I've been coding for almost 40 years now, and still only feel I've scratched the surface of it.

What we've done so far is impressive, but we've really only scratched the surface.

They now even have "professional fundraiser" which means this must be a booming business already and FTC has barely scratched the surface.