| 单词 | core |
| 释义 | core [kȯr] ARCHEOLOGY A piece of stone from which flakes or blades were removed by prehistoric toolmakers; usually it was the by-product of toolmaking but may also have served as an implement. ELECTROMAGNETISM See <<magnetic core>> ELECTRONICS See <<magnetic core>> ENGINEERING The inner material of a wall, column, veneered door, or similar structure. GEOLOGY 1. Center of the earth, beginning at a depth of 2900 kilometers. Also known as earth core. 2. A vertical, cylindrical boring of the earth from which composition and stratification may be determined; in oil or gas well exploration the presence of hydrocarbons or water are items of interest. GRAPHIC ARTS An unflanged cylindrical reel on which film is wound. MATERIALS The center layers of a sheet of plywood. METALLURGY A specially formed part of a mold used to form internal holes in a casting. NUCLEONICS The active portion of a nuclear reactor, containing the fissionable material. OCEANOGRAPHY That area within a layer of ocean water where parameters such as temperature, salinity, or velocity reach extreme values. SCIENCE AND TECHNOLOGY The central part of a body or structure. |
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