Given sufficient mass, an object can cause an otherwise straight beam of light to curve. (science.howstuffworks.com)
De Blasio argued that sufficient mass transit is needed «for all other things to be possible,» including job creation and economic development. (observer.com)
Every galaxy of sufficient mass in the Local Group has an associated group of globular clusters, and almost every large galaxy surveyed has been found to possess a system of globular clusters. (sciencedaily.com)