Because of his color blindness, he has difficulty distinguishing between red and green.

He is overly self-conscious, always worrying about what people think of him.

In organic chemistry, we use the Newman projection to represent the three-dimensional structure of molecules.

The Fischer projection is a commonly used representation method in organic chemistry.

In organic chemistry, we use the Haworth projection to represent the three-dimensional structure of sugars.

In the organic chemistry class, there was an explanation of the Natta projection.

His actions change depending on the circumstances.

He is from a commoner background and succeeded by working hard.

In this old book, the character '緖' is used.

My signature is required on this contract.