original: Dar es Salaam was retained as the territory's administrative and commercial centre.
simplifications: Dar es Salaam was kept as their business centre. Dar es Salaam remained as the administrative and commercial centre. Dar es Salaam remained the territory's administrative and commercial centre. The administrative and commercial center was Dar es Salaam. Dar es Salaam remained the territory's administrative and commercial centre. Dar es Salaam was made the territory's administrative and commercial centre. Dar es Salaam was kept as the territory's administrative and commercial centre. Dar es Salaam continued to be the territory's administrative and commercial centre. Dar es Salaam was kept to be the territory's administrative and commercial hub. Dar es Salaam remained the administrative and commercial center of the territory.