English Original
Lu Ban was a consummate carpenter in ancient China. Legend has it that he once carved a wooden phoenix so lifelike that it flew for three days. Therefore, it was considered the height of folly to display one's skill with an axe in front of him.
This idiom excoriates those who show off their slight accomplishments in front of true experts.
中文翻译
鲁班是中国古代一位技艺超群的木匠。传说他曾雕刻了一只木凤凰,因其栩栩如生,竟在空中飞翔了三天。因此,在鲁班面前卖弄自己的斧工,被认为是极致的愚蠢。
这个成语批判那些在真正的行家面前炫耀自己微末本领的人。