She's always a goody two shoes, and is well-liked by her teachers.

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.

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

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