knee-high to a duck的用法和樣例：
例句
用作形容詞 (adj.)
- I have known him since he was knee-high to a duck.
他很小的時候我就認識他。 - She was able to read music from early childhood.
她從很小的時候就能識樂譜。 - Yet that is a rather trivial aspect of the matter.
然而，那還只是這件事情的一個微不足道的方面。 - The iron dragon marches to your punny defences.
鋼鐵之龍正在向你微不足道的防禦進軍。
