求翻译：通过购买便宜的原材料：土地、建筑材料、人力成本等，建造房产进行公开销售，从而获得开发利润。这种方式，投资者需要具备较强的专业知识、管理能力和风险控制能力。是什么意思？

Public sale, by buying cheap raw materials: land, building materials, manpower costs, the construction of real estate development profits. In this way, investors need to have strong expertise, management ability and risk control ability.

With the purchase of cheap raw materials, land, building materials, labor costs, such as construction, real estate for sales to the public for profit. This way, investors need to have a strong expertise, management capacity and ability to control risk.

Through purchase cheap raw material: The land, the building material, the manpower cost and so on, the construction real estate carries on the public sale, thus obtains the development profit.This way, the investor needs to have the strong specialized knowledge, the managed capacity and risk control

Through the purchase of cheaper raw materials: land, construction materials, and manpower costs, construction real estate for sale, so as to make the development of money. In this way, investors need to have strong expertise, management and risk control.

正在翻译，请等待...