Some projects are completely free and provide only the plans for others to build their projects, and some, like the recent crowd of desktop 3-d printers, even provide the means to self-replicate.
有些项目是完全免费的，且只为他人提供构建其项目的计划，并且有些项目，比如最近很热门的桌面3 - D打印机，甚至可提供自复制的方式。
According to scientists, life began when chemistry begat biology-that is, when simple molecules assembled into more complex molecules that then began to self-replicate.
依照科学家的观念，生命起始于化学产生生物之际，也就是说，在一些简单的分子组合成更复杂的分子并开始进行自我复制之时。
According to scientists, life began when chemistry begat biology-that is, when simple molecules assembled into more complex molecules that then began to self-replicate.
依照科学家的观念，生命起始于化学产生生物之际，也就是说，在一些简单的分子组合成更复杂的分子并开始进行自我复制之时。
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