I achieved a big success.

He graduated from the University of Tokyo.

His dream is greatly expanding.

Under the big tree, he was reading a book.

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

He is undergoing training for extravehicular activity.

He engaged in an extravehicular activity from the spaceship.

One part is important.

Have you finished this year's big cleaning yet?

I was cleaning all day today.