天平受力模型很有用处的，当一个人长期的思考影响事物的因素后，看问题总是比一般人看问题更加清楚，更加全面，而且直接。

The force balance mode is rather useful, after one thinks for too long, he always sees clearer, more comprehensive and more direct than others.

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这些模型的范围可以从200美元到1500美元，并提供最广泛的选择一般人。

These models can range from $200 up to $1500 and provide the broadest range of selection for the average person.

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然后急急忙忙地飞回去，照着王宫的样子用蜂蜡建造了一个皇宫模型，建造的速度如此之快，竟让人以为是从地底下冒出来的一般，天黑之前，已经是大功告成了。

Then they hurried back and modeled the palace in wax with such rapidity that any one looking on would have thought it was growing before his eyes.

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