SOME DOGS famished with hunger saw a number of cowhides steeping in a river. —
一些饥饿的狗看到一些牛皮在河里浸泡着。 —

Not being able to reach them, they agreed to drink up the river, but it happened that they burst themselves with drinking long before they reached the hides.
由于无法够到牛皮，它们决定喝光整条河，但恰巧在到达牛皮之前它们因为喝得太多而自己胀破了。

Attempt not impossibilities.
不要尝试不可能的事情。