Translate the following paragraphs into Chinese. I started working on flexible, one-piece machines not because they seemed like intriguing novelties but because in certain applications, designing for no assembly is a necessity. I began my career studying large mechanical systems such as automotive transmissions. In the early 1990s, however, I found myself designing truly tiny machines—micro electromechanical systems (MEMS). This was largely a circumstance of that era. Telecommunications companies were starting to develop optical switches for fiber-optic networks; they would use minuscule motors to change the angle of mirrors very quickly to route an optical signal in one direction or the other. Not long after I began reading Vogel[ Vogel and exploring elastic design, I embarked on a project with Steven Rodgers and his team at Sandia National Laboratories’ microsystems division, where a monoform design seemed perfect.