In truth, they probably weren't even motivated by the possibility of practical applications — they simply cared about understanding the world around us.

事实上，他们研究的动力可能并非因为存在实际应用的可能性- - -很简单地，他们就是喜欢了解我们周围的世界。

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Practical applications of physics are not all made by those labeled as physicists, for the majority of those who apply the principles of physics are called engineers.

实际应用物理学成果的，并不全是称为物理学家的那些人。这是因为，应用物理学原理的大多数人被称之为工程师。

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Scientific technology brings great change to human, a series of problems caused by rapid progress of science and technology and by the great achievements in the practical applications.

科学技术给人类带来了翻天覆地的变化，随着科学技术的进步和在现实应用中的巨大成就，也产生了一系列问题。

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"I don't like plastic kits, because they look like toys, and most of the applications built by plastic kits are just for fun, without practical use, " he says.

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