摘要
1 About 10 years ago,Lawson was at a beach in Vir⁃ginia watching his kids build sandcastles right next to the waves.2“I kept trying to get them to come back because I thought it was a terrible idea,”he said.He wanted them to build their sandcastles closer to the dunes(沙丘).But they found it more exciting to build right where the waves hit,seeing their sandcastles get destroyed.
