"Narrow crevices" refers to small, narrow openings or cracks in something, like walls, rocks, or objects.
Full definition
Because the robot body changes shape in response to its surroundings, it can slip
through narrow crevices to search for survivors in the rubble left by an earthquake or bombing, he said.
The car, and the pretty young thing, wedged precipitously in the
very narrow crevice proves no obstacle to Ray as he throws protocol to the winds, thinks outside the box, and brings both her and his injured teammate back safely.
They are highly capable: can climb up walls, race along ceilings, ingress
into narrow crevices, rapidly change direction by turning or disappear rapidly by swinging under ledges.»
The larger issue of whether that quite exhausts the story of how great wealth may be legally acquired in our economic system was not raised, but there was not much room for subtlety in
the narrow crevices between commercial breaks.
Take a jetboating adventure with a difference, to a hidden hot water stream, where you disembark, swim through
the narrow crevices and discover the hot water waterfall beyond!
As Carter Radcliff has noted in 2010, «Between these closely clustered forms are
narrow crevices, some of them so deep and intricate that it is impossible to see all the way into them.»