Think of yourself as the carpenter. Think about your house. Each day you hammer a nail, place a board, or erect a wall.
想象一下你就是这个木匠，想象你正在建造这座房子，你每天钉进一颗钉子、安装一块板子或者筑起一面墙。
youdao
Can you get this nail out of the wall?
你能拔出墙上这颗钉子吗？
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