When the well is dry, they know the worth of water.
等井水干涸，人们才懂得水的价值。
— Benjamin Franklin · The Way to Wealth (1758) · Section III —
键盘照着敲一遍，更容易记住。
不用找输入框，直接敲键盘。
When the well is dry, they know the worth of water.
等井水干涸，人们才懂得水的价值。