If you want to build a ship, don't drum up the men to gather wood, divide the work and give orders.

如果你想造一艘船，你需要做的不是鼓励人们去采集木头，分配工作然后发号施令。

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For example, one system might divide materials into metals, polymers, ceramics, glass, wood, and concrete.

比如，有的分类体系可能把材料分成金属，聚合物，玻璃材料，木质材料和混凝土。

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