This is the oldest workingmechanical clock in the world.
这是世界上最古老的还可以使用的机械钟。
《柯林斯英汉双解大词典》
2
Water was the main source of mechanical power, and by the end of the seventeenth century, England alone is thought to have had some 20,000 working mills.
水是机械动力的主要来源，而到了17世纪末，人们认为仅英格兰就有2万个左右的工作磨坊。
3
The computer scientists were working alongside device and mechanical engineers, system integrators, and people who work on applications.