The button of his shirt caught on a thorn.

The existence of 罣 was hindering his progress.

The calyx of this flower is green and very beautiful.

He always speaks the truth as a character of truth.

His jawline is very attractive.

There was a large framed picture hanging in his room.

He is an expert in chemistry.

Morphology, which is a part of linguistics, studies the structure of words.

He devoted his life to the study of science.

He is an expert in bibliography and has many publications.