求翻译：绿道的概念由来已久，在国外更是有一个多世纪的发展历程。本文作者首先对绿道的发展历史进行了学习研究，又对其国内外发展现状进行了归纳总结。是什么意思？

The concept of greenways for a long time in foreign countries is more than a century the course of development. The author first to learn the history of the development of the greenway, but also its development in the world were summarized.

Green Road, the concept has evolved in a foreign country is a multi-century history of the development. First the author of this Article on the green road to the historical development of the learning and study at home and abroad, and in its development status for a summary.

正在翻译，请等待...

Greenway concept has a long history, is in a foreign country for more than a century of history. The writer first for Greenway Development conducted a study of history, and its development are discussed.

The green road concept is long-standing, in overseas has more than a century development course.This article author first has conducted the study research to the green road development history, also has carried on the induction summary to its domestic and foreign development present situation.