rural exodus造句怎么写

"All through the developing world the vanguard of the rural exodus has reached the urban fringes already, and there they huddle, migrants in the favellas and barrios of Latin America, in shantytowns in Africa, in those horrifying encampments one sees on the outskirts of Calcutta and Bombay. "

All through the developing word the vanguard of the rural exodus has reached the urban fringes already.