七巧板

例句：

1. 1. The children were playing with the seven-puzzle puzzles after school.
   孩子们放学后在玩七巧板拼图。
2. 2. The teacher used the seven-puzzle puzzles to teach the children about patterns and symmetry.
   老师用七巧板拼图教孩子们关于图案和对称的知识。
3. 3. The seven-puzzle puzzles were a hit among the students, who loved solving them.
   七巧板拼图深受学生们的喜爱，大家都喜欢解决它们。