| 词汇 | metal |
| 词根词缀 | 词源： c.1300, from O.Fr. metal, from L. metallum "metal, mine, quarry, mineral, what is got by mining," from Gk. metallon "metal, ore," originally "mine, quarry, pit," probably from metalleuein "to mine, to quarry," of unknown origin, but related somehow to metallan "to seek after." 词根记忆： n. 金属,金属制品Which method of making the metal helmet is more economical in total?生产这种金属头盔的方法哪一种总体上更节约? |
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