Sitti 's design needs some work , though . The mechanical miracle still rolls over and sinks occasionally .
尽管西提的设计还需要一些努力；这个机械奇迹还走得不太稳，有时会沉到水里。
Dr sitti , for one , acknowledges that his project may take a decade or longer to commercialise .
斯蒂博士个人就承认他的项目可能要花10年或更长才能商业化。
Instead of relying on an external system for controlling their movements , dr sitti and a colleague use chemical signals to tell the bacteria what to do .
不是依靠外部系统来控制它们的行动，斯蒂博士和一个同事使用化学信号来告诉细菌怎么做。
After months of work , sitti and his students were able to create the first robot that could walk on water .
在几个月的工作后，西提和他的学生们终于能够做出第一个能走在水面上的机械人了。
In 2003 , carnegie mellon robotics professor metin sitti was teaching an undergraduate robotics class that focused on studying the mechanics present in the natural world .
