在早期，有必要设计适合现有的例如木材、石头、砖这样的材料的建筑系统。
In earlier times it was necessary to design structural systems suitable for the materials that were available, such as wood, stone, brick.
它被称为智能方向盘，它的设计适合大多数标准车辆的方向盘，用来跟进驾驶员是否一直将两只手放在方向盘上。
It's called Smart Wheel, and it's designed to fit over the steering wheel of most standard vehicles to track whether or not the driver has two hands on the wheel at all times.
如果这种设计适合您的需要，您就不需要阅读本文余下的内容了。
If this kind of design works for you, you can stop here and ignore the rest of the article.
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