I always think the life is short

# I am convinced that life is only too short.

me too 

# so do I

keep contact with the larger world as far as you can ,then the life would be meaningful.

# keep open mind and broaden your vision. Life can be more more colorful and meaningful

If you don't go out to see the world,you'll consider as this is world.

# if you had never travelled abroad, you would have wrongly sensed the real world.

A journey brings me is not only the beautiful scenery, it makes my mentality changed greatly, let me grow up in the imperceptibly.

# A good journey cannot only bring me a scenery feast, but also gives me a refreshing mind. Within  seconds, I seem to become more mature.

So , when you're young, go to see the world. some thing,you don't do it now,you will never do it.

# Unless you have done it, you will never know how wonderful this world is. Take advantage of  youth to enjoy everything around you and explore all possibility as much as you can. Time is very precious and enjoy the life just in time.

It is my way to express my sentiment you may refer to. It is not perfect at all as I am not a poet. Hope can help you some. 

About travel

I‘m sure a lot of people interesting in travel,. [Do you mean "a lot of interesting people travel"? or "a lot of people meet while traveling"?] Someone [Just one person? Or do you mean "Many people"?] have a dream of traveling around the world. Me too. I always think theat life is short, keep contact [who or what needs to keep contact?] with the larger world as far as you can, then the life wouldwill be meaningful.

If you don't go out to see the world, you'll consider as this [what is 'this'? -- the city or country you live in?] isas the world. I haven’t enough courage to go to the first step of traveling alone, until I met thea man on QQ. He is a traveler,. I told him I want to travel like him, but I haven't enough money and I'm afraid of danger since I just graduated from high school. He told me many interesting travel stroryories and gave me a lot of courage and methods, like Aalways keep alert alert and treat others friendly.

I stayed up all night and thought a lot. The second day, I set out. I fFormally started hitchhiking alone. In that holiday, I climbed over the Tibetan Plateau and Tanggula Mountains, I went to Northwest of China and saw the desert,; everything is so amazing. The most unforgettable thing is to make a lot of friends.
A journey brings me is not only the beautiful scenery, it makes my mentality changed greatly, lets me grow up in the imperceptibly. tThe more you know, the less you know.
So, when you're young, go to see the world. sSomethings, if you don't do itthem now, you will never do itwill.

Wonderful story! It's incredible how traveling and learning new languages can increase our understanding of the world and what exists. Your courage to travel gives me courage too!