Around 1780, William Addis of Clerkenald, England, made his first toothbrush and in the 19th Century his descendants developed and mass-manufactured fine toothbrushes.
The Industrial Revolution, making it possible to mass-produce manufactured goods, was marked by their use of new machines, new energy sources, and new basic materials.
工业革命使大量生产制成品成为了可能，其特点是使用了新机器、新能源和新基本材料。
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The parts used in mass production are often manufactured elsewhere and then put together on a moving production facility known as an assembly line.