“砂砾层”造句
2024年06月21日 13:38:19
沙砾覆于铁质土层与
砂砾层之上.
Gravelly - sand over an iron - pan and gravel layer.
小石头、
砂砾层也可用来做隔绝层,以保持水分,降低土壤的温度.
Pebbles and gravel also insulate the soil to keep surface temperatures low and preserve water.
古河谷的边缘地带,往往缺失底部的河床相
砂砾层.
The edge of the incised - valley lacked the sand - gravel bed of the river channel at the bottom.