quagginess

例句：

1. 1. The ducks are swimming in thepond.
   鸭子们在池塘里游泳。
2. 2. The rainwater collected in the puddle.
   雨水积在水坑里。
3. 3. The children were playingin the pool after school.
   孩子们放学后在游泳池里玩耍。