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.
It has been suggested that they may even be able to hold their breath for longer than an hour or two if needed. Typically when an alligator goes underwater it does so by submerging itself in the water or sinking to the bottom of the water. Afterwards they generally hold their breath and remain there for 10-15 minutes.