Most emerging countries in the Third World are out to carry a bigger share of their trade in their own ships.
句意：多数第三世界的新兴国家都在努力提高用本国商船运载货物的比例。emerging新兴的。 emergent紧急的；浮现的。emergency紧急的；应急的。immersing使沉浸于。newly rising新崛起的。D选项与划线处意义最为接近，故选D。