sand pin

例句：

1. 1. The boat was stuck in the sand and couldn't move.
   船卡在沙子里动弹不得。
2. 2. The workers used sand pins to drive the pile into the ground.
   工人们用沙子钉将桩打入地面。
3. 3.The sand pins were designed to hold the boat together during the storm.
   沙子钉的设计是为了在暴风雨中保持船只的稳定。