(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-vascu…
| 单词 | θ2850 |
| 释义 | the world > the earth > water > rivers and streams > system > [noun] (144) water system1833 (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-vascu… river system1834 a large river and its tributaries considered as a single entity. Subcategories:— natural drainage (8) — flow (3) — run-off (1) — course (10) — descent (1) — surface (1) — head or source (22) — mouth or outfall (28) — broad part (1) — narrow part (2) — shallow part (4) — still part (6) — bend (10) — reach (3) — stretch of broken water (2) — pool as part of (12) — rapids (11) — part for fishing (4) — having no trout (1) — place where rivers meet (6) — river-bed (6) |
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