make ropes of sand

例句：

1. 1. We need to make ropes of sand to build a shelter.
   我们需要把沙子编成绳来建一个避难所。
2. 2. The old man made ropes of sand from the sand dunes.
   那位老人从沙丘上把沙子编成了绳子。
3. 3. The children were making ropes of sand for their playhouse.
   孩子们正在用沙子编他们的游乐场的绳子。