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watershed    音標拼音: [w'ɔtɚʃ,ɛd] [w'ɑtɚʃ,ɛd]
n. 分水嶺

分水嶺

watershed
n 1: a ridge of land that separates two adjacent river systems
[synonym: {watershed}, {water parting}, {divide}]
2: the entire geographical area drained by a river and its
tributaries; an area characterized by all runoff being
conveyed to the same outlet; "flood control in the Missouri
basin" [synonym: {river basin}, {basin}, {watershed}, {drainage
basin}, {catchment area}, {catchment basin}, {drainage area}]
3: an event marking a unique or important historical change of
course or one on which important developments depend; "the
agreement was a watershed in the history of both nations"
[synonym: {landmark}, {turning point}, {watershed}]

Watershed \Wa"ter*shed`\, n. [Cf. G. wasserscheide; wasser water
scheide a place where two things separate, fr. scheiden to
separate.]
[1913 Webster]
1. The whole region or extent of country which contributes to
the supply of a river or lake.
[1913 Webster]

2. The line of division between two adjacent rivers or lakes
with respect to the flow of water by natural channels into
them; the natural boundary of a basin; -- called also
{divide} and {water parting}.
[1913 Webster PJC]

3. a point in time marking an important transition between
two situations, or phases of an activity; a turning point.
[PJC]


Divide \Di*vide"\, n.
A dividing ridge of land between the tributaries of two
streams; also called {watershed} and {water parting}. A
divide on either side of which the waters drain into two
different oceans is called a {continental divide}.
[1913 Webster PJC]

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