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The difference between a tool and a machine is not capable of very precise distinction; nor is it necessary, in a popular explanation of those terms, to limit very strictly their acceptation.
工具和机器之间的区别不能很精确地加以区分;在对这些术语的普遍解释中,也没有必要非常严格地限制它们的可接受性。
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16 种意境 · 9:16 竖屏 · 1440 × 2560 高清图片