knee-high meaning in Chinese
adj.
高到膝盖的 (knee-high to a duck [grasshopper, mosquito] 很小的，微不足道的，无聊的)。
Examples
- I have known him since he was knee-high to a grasshopper .
他很小的时候我就认识他了。
adj.
高到膝盖的 (knee-high to a duck [grasshopper, mosquito] 很小的，微不足道的，无聊的)。