These costs are mainly attributable to the fact that UNIDO is located on the premises of the Vienna International Centre and hence it participates in joint and common services with the other Vienna-based organizations.
之所以有这些费用主要是因为工发组织位于维也纳国际中心大楼内，因此参加了与维也纳其他组织的合办事务和共同事务。