"The hills rolled past"
"The curtains undulated"
"the waves rolled towards the beach"
"The singer's voice undulated"
A couple of..girls swiveled and undulated to the disco-beat.
出自：New York Times
Perry undulated between half-awake stupors and sickly sweat-drenched sleep.
出自： T. Capote
A hill from which..the road, undulating straight onward, was visible.
出自： I. Murdoch