There is a complex love triangle between them.

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

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

I recommend getting vaccinated against hepatitis A.

It was confirmed that he was infected with hepatitis B.

His words carry importance.

The military officer attached to the embassy plays a crucial role in gathering military information of that country.

Ceremonial family occasions are traditional family events in Japan.

This software has backward compatibility.

It's difficult to understand the context of this sentence.