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.
Usually they can hold their breath from 4 - 15 minutes but can remain underwater for two hours if needed and if they arenât stressed. The record time spent underwater is eight hours in freezing conditions; this is because a cold crocodile uses less energy and oxygen so it can hold its breath longer than a warm one.