Translation of "windmill" into Chinese

Spain must move on and tackle its own problems instead of chasing windmills.

西班牙必须举步向前解决它自己的问题而不是追逐风车这样假想的敌人。

I had never seen a windmill until I visited the Netherlands.

在我去荷兰之前,我从没见过风车。

Researchers are applying this concept to make more-efficient boat rudders, water turbines, windmills, and helicopter rotor blades.

研究人员现正运用这个原理,制造出效能更高的船用方向舵、水轮机、风车和直升机的旋翼。