黄口孺子: a suckling babe; babes and sucklings; immature person; a callow
Example Sentences:
1.
Chinese teacher will describe as : " beyond ambition , the young men are not worthy to be taught 中国老师斥之为： “胸无大志，孺子不可教也！ ”
2.
In the ethical thoughts of confucian philosophers in song and ming dynasty , the " fall child " in mencius was often cited as evidence for the human good nature 摘要宋明理学家在其道德学说中，经常征引《孟子》中“孺子将入于井”的譬喻。
3.
Unbelievably , however , we made mistakes in even such small matters . very often , we fetched nails of the wrong size , or got the wrong tools because we did not hear master correctly 说来可能难以置信，即使这种小事也会出错，经常不是拿错钉子的尺寸，就是听错话拿错工具，真是孺子难教也！
