41.  Until now, the tau neutrino remained one of two major undetected particles in the vast theoretical structure called the standard model of particle physics.

42.  Using the modem was much like using a standard model.

43.  What is new is that they have all been installed in one place as part of the standard model.

44.  While those particles are not predicted by the standard model and have never been seen directly in an experiment, their existence would not take theorists entirely by surprise.

45.  Without that final, confirming piece of the puzzle, however the standard model could still be a castle built on clouds.

46.  Physicists are eager to find errors in the standard model because even a small glitch could point to a new and better theory.

47.  He said a sophisticated syndicate ran the car theft operation, targeting luxury vehicles and more standard models such as Volkswagen Golfs and Toyotas.

48.  Instead of spending on various architectural designs and standards for them, Exxon Corp has already adopted a standard model for use world-wide.

49.  Moskvich, whose standard model is the butt of jokes about its frequent breakdowns, has been losing money for years.

50.  Moskvich, whose standard model is notorious for its frequent breakdowns and is the butt of jokes, has been losing money for years.