For, just as all living organisms are constantly evolving in order to adapt and survive in an ever-changing environment, so does the United Nations need always to have the necessary structures and means that will make it as effective as possible.
因为正如所有生物为了适应不断变化的环境和生存下去而不断演变一样，联合国也总是需要使它能够尽可能有效的各种结构和手段。