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I've traveled around the world.

I do a lot of traveling around the world.

I travel. I do a lot of traveling around the world.

I travel all the time.

As the President has indicated, my life has been a life of travel - for 60 years constantly moving over the wide world on journeys which first and last have taken me to 83 countries, and, what is more significant, to most of them again and again.

I really enjoy travelling around the world. I get to meet some extraordinary people.

I travel all the time. And as I go around the world, I try to learn a little something and not just take up all the available air.

I do love traveling, so I've been able to travel a lot.

As I traveled the world over, I traveled everywhere, and I learned so much.

I've been all over the world on my own because, as a scientist, you travel a great deal if your work is reasonably successful or published. I get invitations to go to all sorts of strange countries where I would mostly be by myself and just meet other people there, instead of having travelling companions.