In organic chemistry, the concept of cis-trans isomers is important.

The study of filterable pathogens is an important part of virology.

In organic chemistry, the concept of conformational isomers is very important.

A tesseract is a four-dimensional geometric shape.

A 5-cell is a simple convex polytope in four dimensions.

My heart was healed by the beautiful scenery of Nara.

His way of thinking is commonplace, there is nothing new.

The color of a crow's feathers is black.

His body was surprisingly flexible.

This park is popular among people of all ages and genders.