So what if you prepared for future dehydration by storing up vast reserves of spit.

那么， 如果您通过储存大量唾液来为将来的脱水做准备呢？

Some plants store reserves of water to see them through a drought; others send roots deep down to subsurface water supplies.

一些植物储存水分以度过干旱；其他人则将根深植于地下水源。

But once these plants use up their stored reserve or tap out the underground supply, they cease growing and start to die.

但是，一旦这些植物用完了储存的储备或挖掘出地下供应，它们就会停止生长并开始死亡。