Kanako is my best friend.

Mieko is my best friend.

A unary operator operates on one operand.

This disease is caused by the gene.

In this math problem, it is important to correctly understand the operand.

A binary operator is one of the basic concepts in algebra.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

The Uniform Resource Locator indicates the address of a web page.

Before starting a new business, he said, 'Nothing ventured, nothing gained.'