mid-14c., originally of religion, from French conversion, from Latin conversionem (nominative conversatio), noun of action from past participle stem of convertere (see convert (v.)). General sense of "transformation" is early 15c. Of buildings, from 1921. Conversion disorder "hysteria" (attested from 1946 but said to have been coined by Freud) was in DSM-IV (1994).
权威例句
1. Currency-conversion costs remain one of the biggest obstacles to cross-border trade.
货币兑换成本仍是跨境贸易的最大障碍之一。
2. These are the people who are doing our loft conversion for us.
就是这些人在为我们改造阁楼。
3. It is always worth having a loft conversion costed out.
估算一下改建阁楼的费用总是很有必要的。
4. It's hard to trust the President's conversion.
总统信仰的改变让人难以相信。
5. the conversion of farm buildings into family homes