There are still vacant seats on the train.

Oil is an important element of the world economy.

I saw a wagtail in the park.

He is learning Ancient Greek language.

I want to go see the Statue of Liberty someday.

Père David's deer, also known as the 'four unlike', is a species of deer native to China and is listed as an endangered species.

When I looked up at the night sky, I saw a beautiful asterism.

This plant is bisexual, with male and female flowers occurring on the same plant.

This compound has a high basicity.

His voice sounded very gentle.