Shengtai, jiaotong yu xianji fenzheng, yi Qingdai Zhanghe Caoqiao de xiongzhao wei zhongxin 来自 EBSCO 喜欢 0 阅读量: 59 作者: C Seng 摘要: Grass bridges (caoqiao) were floating bridges made of grass, twigs, and ropes that enabled river crossing at different water levels -- due to ...