单词 | summit level |
释义 | > as lemmassummit level summit level n. (a) the highest elevation of a canal or railway; (b) a level stretch of a canal or railway having descending levels on either side; (c) (as a modifier) designating a canal which connects separate river valleys or water-drainage regions. ΘΚΠ the world > space > relative position > high position > [noun] > height above the ground or sea level > highest summit level1771 society > travel > transport > transport or conveyance in a vehicle > public passenger transport > [noun] > a level place in a railway summit level1771 1771 J. Trail Rep. conc. Practicability & Expence Grand Canal 16 Finding it..necessary to have a low center Level, consequently two summit Levels, or Canals of Partition, as in the Profile. 1789 Trans. Royal Irish Acad. 1788 2 Science 151 Total elevation of summit level, 270 [feet]. 1817 Raleigh Reg. & N. Carolina Gaz. 9 May The water must be drawn out of the connecting cut or summit level canal. 1840 F. Whishaw Railways Great Brit. & Ireland 175 The line ascends to the summit-level for a length of 4 miles 52 chains. 1901 Engin. News 18 Apr. 274/2 A guard lock..prevents the piling of the lake water into the eleven-mile summit level [of the canal] by westerly winds. 1978 Times 28 June 14/4 The new Rhine-Maine-Danube canal has a summit level twice as high as any in Britain. 2013 Belfast Tel. (Nexis) 17 Aug. 25 The Newry Canal is the oldest 'summit level' canal in the British Isles and was a major feat of 18th century engineering and ingenuity. < as lemmas |
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