The battery has run out, so I have to go buy a new one.

Let's start the meeting according to Korea Standard Time.

His words carry importance.

This eigenfunction is one of the fundamental concepts of quantum mechanics.

This area is my specialty.

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.

This book has up to three volumes.