contraption

He spent years building a complex contraption designed to sort recycled glass by color.

(Chinese) 他花了几年的时间建造了一个复杂的装置，旨在按颜色对回收玻璃进行分类。

The old tractor looked like a rusty metal contraption that would never start again.

(Chinese) 那台旧拖拉机看起来像个生锈的金属机械，再也发动不起来了。