The headlight of my bicycle has broken.

The prepositional case plays an important role in English grammar.

Learning how to use enclitics helps deepen your understanding of Japanese.

Prefix notation is a notation where the operator comes before the operands.

I use a set square to draw shapes.

In chemistry class, I learned about acid anhydride.

In chemistry class, I learned about acidic oxides.

Lower fatty acids play an important role in the human body.

Essential fatty acids are necessary to be taken from our diet because our body cannot produce them on its own.

Essential amino acids are vital nutrients for the human body.