After a long journey, Jotaro and the others finally reach Cairo. They go to a cafe and ask if anyone knows where DIO's mansion is located by showing the picture around. Then, someone says that they have seen the building before.
so the sun's rays would directly hit 
the glass and melt the chocolate.
وذلك كي تتسلّطَ أشعةُ الشمسِ بشكلٍ مباشر على الزجاجةِ وتُذيب الشوكولاتة
damit die Sonnenstrahlen das
Stück direkt treffen konnten.
permitió que la luz del sol 
derritiera el chocolate.
permitió que la luz del sol 
derritiera el chocolate.
il a exposé le chocolat
aux rayons du soleil.
per permettere ai raggi solari
 di raggiungere il bicchiere.
para que os raios do sol atingissem 
diretamente o vidro e derretessem o chocolate.