churn in Business English. churnnoun [ U ] Preventing customer churn is a major concern for mobile service providers, since 20-40% of customers leave their providers in a given year. Employee churn for new hires increased by 33% for the third straight year.
For 18 months, the baby nurses while its mother is on land, or it swims underwater to suckle. When it dives, the calf closes its nose and ears to block out water. All hippos have this ability. They also have membranes that cover and protect their eyes while they are underwater.
Though all turtles breathe air, aquatic turtles such as sliders (Trachemys scripta) and painted turtles (Chrysemys picta) can stay underwater for quite some time. Because of their slow metabolisms and adaptations for extracting oxygen from the water, some species can even spend the entire winter underwater.