Other new staples are extensive training modes, comeback mechanics and emphasis on 2.5 D aesthetics for extra mass market appeal. (snackbar-games.com)
They aren't, though, which implies that the gravity of some unseen extra mass — thought to be dark matter — holds these galaxies together. (newscientist.com)
Now the power available in the brake system governs stopping performance.The extra mass of a trailer causes the switch to happen much sooner. (mechanics.stackexchange.com)