Channels created by icebreakers are quite narrow and few in number compared to natural gaps in the ice. (nsidc.org)
Only take a coffee break or lunch break when there is a natural gap in your schedule — the tissue culture hoods are rarely booked solid at 8 a.m. or over lunchtime. (sciencemag.org)
Using the natural gaps in the dried grape vine, I start weaving in my cedar branches. (cocokelley.com)