Not even on the walls could you find a small nail hole that would have held a picture.
这所漂亮的房子里没有留下任何一处斑点、污渍或是小洞，甚至在墙上你也找不到一个曾因为挂过画而留下的小钉孔！
What you will need: an empty plastic soda bottle, a small nail, pliers and some water.
实验所需：一个空的塑胶汽水瓶，一根小钉子，钳子和一些水。
What you will need: an empty plastic soda bottle, a small nail, pliers and some water.
实验所需：一个空的塑胶汽水瓶，一根小钉子，钳子和一些水。
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