Collagen is important for maintaining the firmness and elasticity of the skin.

She is the empress of our country and is deeply loved by the people.

He began to beat on the door in a hurry.

I saw a red-crested cardinal in the park.

The Oriental stork is one of the endangered species and is particularly protected in Japan.

Uvular consonant is a sound that does not exist in Japanese.

A velar sound is a sound that is pronounced at the back of the mouth.

We decided to travel by land.

We decided to go by land across the mountain.

He made strenuous efforts to pass the exam.