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单词 spring
释义
spring

Mathematics
  • A device, usually made out of wire in the form of a helix, that can be extended and compressed. It is elastic and so resumes its natural length when the forces applied to extend or compress it are removed. How the tension in the spring varies with the extension may be complicated. In the simplest mathematical model, it is assumed that Hooke’s law holds, so that the tension is proportional to the extension.


Geology and Earth Sciences
  • A flow of water above ground level that occurs where the water-table intercepts the ground surface. Where the flow from a spring is not distinct (i.e. it does not give rise to obvious trickles) but tends to be somewhat dispersed, the flow is more correctly termed a ‘seep’. The reappearance of surface water that had been diverted underground in a karst region is a type of spring known as a ‘resurgence’. A major variety is the ‘Vauclusian spring’, named after the Fontaine de Vaucluse, southern France, and descriptive of the upward emergence of an underground river from a flooded solution channel.


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