He made a model of a dodecahedron.

This house is warm even in winter because it has double-pane windows.

He is learning how to use the second adjective.

Double dipping is a breach of etiquette.

This game is really fun from the second playthrough.

Redistribution of this software is prohibited.

Octans is one of the constellations in the southern sky.

Please calculate the quartiles of this data set.

He is studying Kanji.

This world where people live is beautiful, and sometimes harsh.