This shape is a parallelogram.

The twenty-four divisions of the solar year, or 'Nijyushi Sekki', is a system that divides the year into 24 parts according to the changes in nature.

He is working round the clock.

My four treasures of the study are a fountain pen, a pencil, an eraser, and a ruler.

My brother is a famous biologist.

I use a tram for commuting every day.

It is rumored that he is a member of a secret society.

The continental slope is a part of the seafloor topography, connecting the continental shelf and the deep sea floor.

He is a world-renowned ichthyologist.

The SI system is a standard unit system used worldwide.