After school, we study at the library.

He sneaked into the school through the back gate.

He suffered a minor contusion on his occiput.

The trailing edge of this airplane has a very unique shape.

Geographic Information Systems are very useful tools for map making and spatial data analysis.

We will create a map using geographical information.

He is working as an agent for the Central Intelligence Agency.

Everyone, please have a good new year.

Back vowels are vowels that are pronounced using the back of the tongue.

A back vowel is a sound where the back of the tongue approaches the palate.