border'BNC²³⁶²¹³⁺¹ 例句 Along with the development of the construction, the soft rock problem is more extrude. The soft rock slope border' s instability is the most familiar problem in rock slope border engineering. 随着工程建设的开展，软岩问题愈趋突出，软岩边坡变形失稳是最常见的岩质边坡工程问题。 cnki