Many camps offer field trips, but with large ratios, it is difficult to watch every child. (articles.chicagotribune.com)
«Most school districts have policies that address playground supervision issues such as teacher / student ratios, and those are typically larger ratios than in a classroom setting,» she said. (educationworld.com)
Among the undiluted binaries, planet - like eclipses may be caused by grazing EBs and the (central) eclipses of two stellar components with large ratios in area or surface brightness, typically due to a large mass ratio. (aanda.org)