as mad as a March hare 像三月的野兔一样疯狂”用来形容人极度疯狂或非常愚蠢。这是因为每值春季繁殖期，兔子会表现出一系列激动无常的行为，就像发狂一样疯疯癫癫的；疯狂地。

【例句】
Janet's as mad as a March hare - always saying and doing really bizarre things - but we love her just the way she is.
虽然珍妮特整天疯疯癫癫的，总是不断地说着和做着奇怪的事情，但我们仍非常喜欢她这个人。

We had an argument yesterday and he smashed all the plates in the kitchen – he was as mad as a March hare!
昨天我们吵了一架，他把厨房里的盘子都摔碎了，他当时真是发疯了！