It turns out, for example, that several different proteins may be produced from a single stretch of DNA.
The sequences may recycle, but in doing so they demonstrate their potential eternity: the work is not the single stretch but the endless repetition.
Hidden beneath overhanging trees and marked only by overgrown restaurant signs measuring the metres to your next meal, a single stretch of restaurants showcase Brazil's huge cultural diversity.
The single stretch of bars, shops and clubs seemed to be competing to see which could have the ugliest display of flashing fairy lights in the window.
He filmed the beads of sweat provoked by the sun, probably even her pores — although that smooth, uniform skin seemed to have no pores, no folds or bumps, and not a single stretch mark marred her buttocks.
Instead, for whatever reason, as the Free Press noted, a quarter of the remaining samples "came from a single stretch of Flushing Road in Flint," which had a water-main section only a few years old.
Three stencils by the street artist Banksy have been destroyed by construction workers in Melbourne, bringing the number of works by the renowned artist wrecked on a single stretch of inner-city laneway to five in two years.
We did try to look after her in her own home, as Win so ardently wished, but eight days was the longest single stretch that she coped with at home.
The Iron Triangle, a 13-block area between Shea Stadium and the Flushing River in Queens, is the largest single stretch of junkyards in New York City, with more than 100 auto salvage yards, repair garages and automotive shops.
The death toll was the highest in a single stretch since July 8, when at least 62 people were killed by gunfire from soldiers and police officers who shot at a group of Mr. Morsi's supporters.
They'll take on fat and build flight muscles, and then fly 2,400km or more at a single stretch, arriving at their destination exhausted and vulnerable, and overwhelmingly dependent on being able to find easy food, which is what horseshoe crab eggs used to represent.
