The sperm whale is a large whale that lives in the deep sea.

He is an expert in ethology.

Rui is accumulating study every day.

This area is rich in bedded cupriferous iron sulphide deposits.

He is researching on the pathogenesis and treatment of early-onset diabetes.

He quoted the proverb 'Once a word leaves your mouth, you cannot chase it back even with the swiftest horse' to teach me to choose my words carefully.

He was known as a bully at school.

I fed the pigeons in the park.

You should not be deceived by the deceptive advertising of this product.

The artificial satellite is orbiting around the earth.