valley bog河谷沼泽,河地沼泽,低位沼泽
valleyn.山谷;溪谷;流域
valley-in-valley structure叠谷构造
Valley land ecological corridor谷地生态廊道
Valley type waste landfill site山谷型垃圾填埋场
valley water security management流域水安全管理
Valley Of The Purple Butterflies紫蝶幽谷
Valley Landform in Guangdong Province广东河谷地貌