He is writing a thesis on abiogenesis.

I am majoring in developmental biology at university.

He likes to take a walk in the park at dusk.

This ditto mark indicates the same meaning as the previous sentence.

We need to find a foothold to advance this project.

In this situation of the game of Go, the black stone has lost its liberty.

This song is characterized by the use of staccato.

He turned right at the intersection.

Today is the winter solstice, the shortest day of the year.

He exceeded the K-point in ski jumping.