结果就是看到的这组样本，从东北海岸相对暗一点粗糙些的沙子到东南海岸这些白皙且细腻的沙子。
The result is a row of samples shifting from the relatively dark, coarse grains of the Northeast to the fine white beach sand of the Southeast.
她和她的儿子在粗糙的沙子上玩。
脚下的地面铺了沙子般的粗糙，好像岩尘不怎么舒服。
The ground under their feet gritted harshly, like lava-dust.
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