Let's go buy winter clothes.

This winter scenery is really beautiful, isn't it?

He participates in rigorous winter training every year.

I achieved a big success.

He graduated from the University of Tokyo.

Under the big tree, he was reading a book.

His dream is greatly expanding.

In linear algebra, the upper triangular matrix plays a very important role.

A lower triangular matrix is a matrix where all the elements below the main diagonal are zero.

My university is in Tokyo.