a complicated piece of machinery的用法和样例：
- As this protein emerges from the ribosome, it wraps around itself into a complicated three-dimensional structure, and a new piece of machinery is now ready to float off and begin work.
- This is a wonderful piece of machinery.
- Anyone who says you can have a lot of widely dispersed people hack away on a complicated piece of code and avoid total anarchy has never managed a software project.
- No athlete would ever expect to hit a home run with their legs crossed while slouching, so how could someone ever expect to play a complicated piece of music on an instrument with poor posture?