单词 | perch |
释义 | perch [pǝrch] MECHANICS 1. Also known as pole; rod. 2. A unit of length, equal to 5.5 yards, or 16.5 feet, or 5.0292 meters. 3. A unit of area, equal to 30.25 square yards, or 272.25 square feet, or 25.29285264 square meters. NAVIGATION A staff placed on top of a buoy, rock, or shoal as a mark for navigators; a ball or cage is sometimes placed at the top of the perch, as an identifying mark. VERTEBRATE ZOOLOGY 1. Any member of the family Percidae. 2. The common name for a number of unrelated species of fish belonging to the Centrarchidae, Anabantoidei, and Percopsiformes. |
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