loessn.[地]黄土
loess concretion黄土结核
loessial plateau黄土高原
loess collapsing黄土崩滑
loess-red clay黄土-红粘土
loess hidden cave黄土暗穴
loess ravine area黄土沟壑地带
loess-like soil黄土状土
loess hilly areas黄土丘陵沟壑区
Loess in Luoehuan洛川黄土
Loess hill region丘陵沟壑区