You can enjoy a quick snack while your children cavort in the sand.
当孩子们在沙子里嬉闹时，你就能快快享用一份小吃了。
Two people stuck in quick sand can't help each other.
两个陷入流沙的人是不可能互助的。
Sand under quick condition is often called quicksand .
通常把快速流动的沙叫做流砂。
Sand under quick condition is often called quicksand.
通常把快速流动的沙叫做流砂。
Sand under quick condition is often called quicksand.
通常把快速流动的沙叫做流砂。
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