Man’s first real inventions, and on

Man’s first real inventions, and one of the most important inventions in history, was the wheel．All transportation and machines in the world depend on it．
The wheel is the simplest yet but perhaps the most remarkable(值得注意的)of all inventions．Because there are no wheels in nature－no living thing was ever created with wheels．How, then, did man come to invent the wheel? Perhaps some early hunters found that they could roll the carcass(尸体)of a heavy animal through the forest on log more easily than they could carry it．However, the logs themselves weighed a lot．
It must have taken a great prehistoric(史前的)thinker to imagine two thin slices(薄片)of log connected at their centers by a strong stick, this would roll along just as the logs did and axle(轴)came into being, and with them the first carts．

結果 (中文) 1:

人的第一次真正发明，并在历史上，最重要的发明之一是 wheel.All 运输和机器世界依赖于它。轮子是最简单但也许最显著 (值得注意的) 的所有 inventions.Because 有没有轮子在自然无生命的东西永远用 wheels.How，创建，然后男人来发明轮子吗?也许一些早期的猎人发现他们可以滚的尸体 (尸体) 沉重的动物穿过森林日志上比他们可以携带 it.However，日志本身权衡了很多更容易。它必须采取一个巨大的史前 (史前的) 思想家，想象两个薄片 (薄片) 的日志由根结实的棍子在其中心连接，这会滚动，就像日志并轴 (地轴) 便应运而生，并与他们第一次车。

結果 (中文) 3:

人的第一个真正的发明，和有史以来最重要的发明，是轮子。世界上的一切交通工具和机器的依赖它。
轮子是最简单但也许是最显著的（值得注意的）的发明。因为自然界没有轮子－生物还没有被创造出来过车轮。怎么样，然后，没有人来发明轮子的呢？也许是一些早期的猎人发现，他们可以将其尸体（尸体）的沉重的动物穿过森林的日志比他们可以把它更容易。但是，记录自己的体重了。
必须采取伟大的史前（史前的）思想家想象两薄片（薄片）日志的强棒连接在中心，这将沿着刚刚推出的圆木做轴（轴）应运而生，并与他们的第一车。