提起水坝，人们脑海中可能会出现很多宏伟的大坝建筑： When you think of DAMS, you probably think of a lot of grand dam buildings: 比如：美国的胡佛水坝和中国的三峡大坝等。For example, the Hoover Dam in the United States and the Three Gorges Dam in China. 它们的建筑材料是：土石或钢筋水泥。Their construction material is: earth stone or reinforced cement. 在山东省临沂市，我见到了一个另类的水坝：用橡胶材料建造的。因为建坝地址的原始村名叫“小埠东（bù dōng）”，所以叫“小埠东橡胶坝。” In Linyi, Shandong Province, I saw a different kind of dam: it was made of rubber material. The native village where the dam is built is named “xiǎo bù dōng”, so that is the reason.