第一,自然力。自然力变成生产力分两种情况:其一是能够直接进入生产过程的自然力——它能够在生产过程中现实地发挥作用并将自身内涵现实地转移到产品上去,如风力、水力、土地的肥力等;其二是不能直接进入生产过程但却作为该过程不可缺少的 First, natural forces. Natural forces into productive forces are divided into two situations: one is the natural force that can enter the production process directly - it can actually play a role in the production process and realistically transfer its connotation to the product, such as wind, water, land fertility Etc .; the other is that they can not go directly to the production process but are indispensable to the process