3. I build a light structure — - it could be built of wood — which the rope walker is going to carry in her hands, or in his hands, just like this.
建一个轻质结构-，可以是木质的-，走绳者把它，拿在手里，像这样。
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4. I'll make the rope walker a little smaller — you'll see shortly why I make it a little smaller.
我把他画小一点-，你们马上会知道我，为什么把他画小。
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5. Okay, let's ask this rope walker to give us a demonstration.
现在我们让它,给我们一个演示。
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6. And the distance between the center - of mass and the rope-- let that distance be one meter, and let the mass of the rope walker be 70 kilograms.
重心到绳子的,距离-,这距离为1米，走绳者的重量,设定为70公斤。
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7. The trained dancer must not only have grace and elegance, but also the leap of an Olympic hurdler, the balance of a tight-rope walker and panther-like strength and agility.
