| 词汇 | economical |
| 词根词缀 | 词源： 1570s, "pertaining to household management; from economic + -al. Meaning "pertaining to political economy" is from 1781; that of "thrifty" is from 1780. Related: Economically. 词根记忆： a. 节约的,经济的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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