Those countries were also extremely vulnerable to external factors, such as natural disasters and instability in world prices for raw materials, and were still facing the traditional obstacles, such as the vicious circle of debt, in which the countries of Africa remained trapped.
这些国家还很容易受外部因素的影响，如自然灾害和全球原材料价格不稳定等，并且仍面临着传统障碍，如非洲国家仍陷其中的债务的恶性循环。