| 单词 | perimeter |
|---|---|
| 音标 | [pə'rimitə] |
| 解释 | n.周长 |
| 红宝书 | 【英】 n. 周长(the boundary of a closed plane figure or the length of it) 【考】 circumference : cirle / perimeter : rectangle / border : country(圆周是圆边的总长/ 周长是矩形边的总长/ 边界是国家边的总长) 【记】 peri(周围)＋meter( 测量)→周长 |
| 字源 | perimeter (n.) early 15c., "line around a figure or surface," from Latin perimetros, from Greek perimetron "circumference," from peri- "around" (see peri-) + metron "measure" (see meter (n.2)). Military sense of "boundary of a defended position" is attested from 1943. |
| 不择手段背单词 | n. 周长 【记】peri周围, meter测量－测量周围的长度 【类】circumference: circle = perimeter: rectangle[circle] = border: country圆周是圆的总长 = 周长是矩形的总长 = 边界是国家的总长 |
| 趣味全助记 | 【记】peri+meter |
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