Today was the 100th anniversary of the university where I want to study and to celebrate they mhade a college fair for the first and last time in its history.

This university is at the top so they don't need to do college fairs because they don't need to do a presentation.

So, today I discovered a career thatof which I didn't know, which is Urban Design or Urbanism.

This career is about designing the streets where the people will transportmove unlike architecture which is about designing the structures where the people will live and work.

面白そうです！

Today was the 100th anniversary of the university where I want to study andgo to celebrate they made a college fair for the first and last time ind 100 years (of its establishment). To celebrate, for the first time (ever), its historyad a college fair.

- although your translation was grammatically correct, a native would put it more simply, as I have done !
- we would use ‘it’ instead of ‘they’ as you are talking about the university (singular).
- there is no need to say the last time unless you are stressing that they will never ever do it again, if so, you can put this!

Thise university is atone of the top universities in the country, so they don'’t need to do anymore college fairs becauseas they don' not need a presentationthe publicity/media coverage.

- we would use publicity/media coverage here, presentation means a verbal speech given to an audience.
- this is a very nuanced usage of ‘as’ instead of because, I find it difficult to explain so I will give you more examples: “As she had finished studying, she decided to go to bed.” “She was late to school as she had slept in.” It cannot be substituted in every circumstance, but there are circumstances where it would be more proper to use ‘as’ instead of ‘because’, and in this context they virtually mean the same thing (introduction of context/a justification). The best way to learn these circumstances would be to consume as much native material as possible!

So, today I discovered a new career that I didn't know, which iwas Urban Design or Urbanism.

- using the adjective ‘new’ implies that it is new to you, you do not need to put ‘that I didn’t know’. A native would just say ‘new’ as well!
- was must be used as you are talking about a past experience

This career is about designing the streets where the people willused for transportation, unlike architecture which is about designing the structures where the people will live and work.

- you are describing the career of architecture so you don’t need to use the future tense
- transport/transportation -> noun, “do you need transport/transportation?” “It is used for transporting people from x to y.” “It is used for transportation.” If you are talking about something more formal, like a function as you have above, I would recommend transportation instead of transport !
- do not use an article (the) with people unless you are talking about a specific group of people “look at the people dancing!” “The people are here.”

Today was the 100th anniversary of the university where I want to study and t. To celebrate, they madeheld a college fair for the first and last time in itstheir history.

This university is at the toptop-ranked, so they don't need to do college fairs because they don't need a presentany sort of introduction.

So, today I discovered a career that I didn't know of before, which is Uurban Ddesign or Uurbanism.

This career is about designing the streets where the people will transport unlikemove about, as opposed to architecture, which is about designing the structures where the people will live and work.