I saw a flying object in the sky.

The theory of black body radiation is an important part of physics.

The housing of this electronic device is very sturdy.

I strive for body care by doing moderate exercise and eating a balanced diet every day.

The complement system of the immune system plays an important role in eliminating foreign substances in the body.

They made love every night, deepening their affection.

This calligraphy uses old character forms.

He designed a building in the shape of a cone.

Core training helps to improve the muscle strength of the whole body.

This elongated statue is the most popular exhibit in the museum.