contrivance

这个精巧的机械装置能自动给花园浇水。

The ___contrivance automatically waters the garden with its clever mechanism.

用这么复杂的装置来开罐头真是多此一举。

Using such an elaborate ___contrivance just to open a can is totally unnecessary.

主角突然找到丢失多年的钥匙纯粹是剧情的牵强安排。

The protagonist suddenly finding the long-lost key was a clumsy ___contrivance in the plot.