1 The soil is a gravel if the percentage of gravel is estimated to be more than the percentage of sand.
1 The soil is a gravel if the percentage of gravel is estimated to be more than the percentage of sand.
1如果砾的百分含量比砂的百分含量估计的多,这个土就是砾石.
1 The soil is a gravel if the percentage of gravel is estimated to be more than the percentage of sand.
1如果砾的百分含量比砂的百分含量估计的多,这个土就是砾石.