We need to simplify this project.

Fluoridation is a part of chemical reactions, a process where fluorine combines with other elements.

Our company is increasing efficiency by digitizing operations.

He is an expert in ethology, and his research is highly regarded worldwide.

I used an optical microscope for an experiment at school.

Demography is an important tool for understanding various aspects of society.

Koushirou is my best friend.

Kou Sennen is my best friend.

The photoelectric effect is a phenomenon where a material emits electrons after absorbing light.

He suddenly stiffened and fell down.