He increased the time spent together to deepen his relationship with her.

It is important for us to deepen our friendly relations with neighboring countries.

Yuko is my best friend, he always helps me.

We have built a long-standing friendship.

Health is very important.

His opinion is very important.

I go jogging every day.

We have maintained a good relationship for a long time.

His research is deeply related to my project.

That is my personal issue.