He fastened his belt to secure his pants tightly.

His thought is very unique.

This sentence is very long.

Fumiaki is my best friend.

This sentence uses a colon to connect two related ideas.

He put on his new cologne and went out on a date.

He fell asleep with a thud.

I will work using this laptop.

His research is closely related to my project.

This issue is closely related to his research.