She works as a librarian.

You can solve the problem by using this method.

This company strictly adheres to the principle of fair trade.

He saved money using the 'hou' (alternative spelling of 'fran') to go to France.

Taxonomy is the science of finding, understanding, and naming species of organisms.

Taxonomy is an important tool for understanding the diversity of life.

He is good at solving trigonometry problems.

He surprised people by using magic.

Understanding patent law is important for protecting new inventions.

Ex post facto laws pose a problem for a fair legal system.