高低不平 in English:

The groud had been ploughed and was consequently very uneven to walk upon.

uneven surface

Health care system delivers profoundly uneven quality.

uneven distribution

I was just hopping around, like someone with a limp or uneven legs. Talk about not cute – that was definitely not cute!

For this reason, they’re not exceptionally accurate; if your stride length varies (which is more likely if you’re running or navigating uneven terrain), a pedometer may have a margin of error greater than 10%.

The tamborim lends a very slightly uneven and highly distinctive 16th note groove to samba music.