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

Her name is Secret.

She revealed a secret to me.

The storehouse is the best place to store old furniture.

He dreams of becoming a champion in mixed martial arts.

He became the champion of the mixed martial arts competition.

An intercontinental ballistic missile is a weapon with a very large destructive power.

Functional analysis is a branch of mathematics that studies the properties of functions in infinite-dimensional spaces.

Simple Mail Transfer Protocol is a protocol for sending and receiving emails on the Internet.

Himemiko is my best friend.