Bosporus ( the Strait of Istanbul ) links the Black Sea to the Sea of Marmara , is one of the most dangerous and busiest waterways in the world and has geopolitical , strategic and economic importance .
博斯普鲁斯海峡是世界上最危险和最繁忙的航道之一,在地理政治学上、战略上和经济上具有重要意义。