duckboard

例句：

1. 1.They used to use duck boards to cross the river.
   他们过去使用鸭板过河。
2. 2.The duck board is a popular activity for children during winter break.
   鸭板是孩子们在寒假期间受欢迎的活动。
3. 3. The duck board was a fun way for kids to exercise and have fun together.
   鸭板是孩子们锻炼和玩耍的好方法。