He started an investigation to know the fact of the incident.

If a nuclear war occurs, humanity will be extinct.

His looks are very approachable.

The implementation of this package is very complex.

I modified the program to implement a new feature.

This issue requires respect for the opinions of both sides.

He put down the luggage on both shoulders.

He has devoted his life to the creation of music.

He is good at creating new ideas.

He is facing the struggle of life.