(dated)act recklessly or unconventionally(旧)鲁莽（或不依惯例）地干
tilt at windmills
To confront and engage in conflict with an imagined opponent or threat.与假想的对手作战：面对假想的敌人或威胁；同假想的敌人或威胁作战
柯林斯高阶英汉双解学习词典释义
N-COUNT
风车磨坊；（风力发电的）风车
A windmill is a building with long pieces of wood on the outside which turn around as the wind blows and provide energy for a machine that crushes grain. A windmill is also a similar structure that is used to convert the power of the wind into electricity.