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.
When breathing, the frog will keep its mouth closed. Air is then drawn through the nostrils to the lungs. This action is caused by the movement of their pulsing throat. Body contractions enable them to release carbon dioxide. When a frog fills its lungs with air, it enhances its buoyancy when back in the pond.