基底起伏 meaning in English

basement relief

But the conflict between them was appeared during our research in field and the discussion with others . it is followed that the former with the rolling bedrock , the mid with mild bedrock and the latter with the stable bedrock relatively . the conflict between two conclusion above arise , what relationship between loess landforms and their bedrock exist
但在野外调查及同其他学者交流中发现两者并非总体对应一致，显示出陕北黄土高原南部黄土塬基底起伏相对较大，北部黄土梁状(为主)丘陵沟壑区及黄土峁状(为主)丘陵沟壑区基底相对平坦的特征。