有些植物是木本植物，这是一种适应性的设计，以防止植物组织萎缩时，水分胁迫产生萎蔫。
Some plants are woody in type—an adaptation designed to prevent collapse of the plant tissue when water stress produces wilting.
灌溉产生的多余水分渗入地下水。
Excess water from irrigation sinks down into the water table.
AHA果酸能够帮助皮肤自己产生更多的水分，科兰驰菲尔德说。
They can help skin produce more moisture on its own, Crutchfield says.
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