Comma after menu, period at the end of the sentence unless the context of the story leads to it being an exclamation
Answer:
1. Buenos Aires tiene una de las culturas de café <em>más famosas del mundo</em>.
2. Los cafés de Buenos Aires <em>desempeñan un papel clave en la vida social y cultura popular argentina</em>.
Explanation:
1. Buenos Aires tiene una de las culturas de café <em>más famosas del mundo</em>. (Such culture contributed to the building and maintenance of material and immaterial heritage on urban environment of the city).
2. Los cafés de Buenos Aires <em>desempeñan un papel clave en la vida social y cultura popular argentina</em>. (Cafés in Buenos Aires were places where most important events happened in social, cultural and political history of Argentina. Artists such as Carlos Gardel or Federico Garcia Lorca visited those places.)
The Krebs cycle
Glycolysis
Pyruvate oxidation
I think you can get an english-arabic dictionary. it helps a lot. also, you can get a tutor that speaks arabic and learn from his/her
