超文本和超媒体有一个主要特征，即非线性的信息连接。

Hypertext and hypermedia have as a major property a non - linear information link.

youdao

其特征是下鞋底里面开有三个椭圆形孔，椭圆形孔里面安有三个弹簧，下鞋底与上鞋底通过固定螺钉连接。

Its features are under sole opened inward has three elliptic hole, elliptic hole inside Ann has three spring, under the soles and soles through screw connection.

youdao