His eyes were filled with deep sorrow.

He is known as a person with learning.

There are various types of plants in my garden.

He has a wealth of scientific knowledge and is always excited about new discoveries.

We should cherish friends who share our values.

This painting is very valuable.

He says 'knowledge is power' and studies hard every day.

He is widely recognized as an intellectual in that field.

Did you know this trivia?

The utility value of this app is very high.