n.山脈
North of the Cordillera is the karst country where the limestone has been acted upon by water to produce a series of small steep hills and deep holes, both conical in shape. 山脈的北部是巖溶地區(qū)，那里石灰石在水的作用下締造了一系列陡峭的小山和深邃的洞穴，兩者在形狀上都呈圓錐形。
