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单词 water system
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water system
water system n. (a) a river and its tributaries, considered as a unit; (in early use also) a group of connected rivers and streams (rare); (b) Zoology = water-vascular system n. (rare).
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the world > the earth > water > rivers and streams > system > [noun]
water system1833
river system1834
1833 Penny Cycl. I. 436/2 North America possesses an extensive water-system on the Pacific slope.
1849 L. Agassiz Twelve Lect. Compar. Embryol. v. 46/1 In the Actinia, the water system is plainly developed..in the forms of minute pores arranged in vertical series.
1859 H. Kingsley Recoll. G. Hamlyn xix Having crossed the valley of the Belloury,..I had come on to the water system of another main river.
1998 Wildlife News Jan. 4/1 The report marked the end of a two-year Cherwell Otter Habitat Project which involved surveying over 270 km of water system and carrying out a variety of enhancements to create habitats for otters.
2004 P. J. Hayward Nat. Hist. Seashore iii. 106 The madreporite and its associated stone canal was thought to function to top up the water system.
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