英语词源
- preformed (adj.)
- c. 1600, from Latin praeformare or else from pre- + formed (see form (v.)). Of plastic and synthetic products, from 1918.
权威例句
- 1. The colorimetric methods involve the bleaching of a preformed color by the fluoride ion.
- 比色法涉及氟离子对预先形成的颜色的消色作用.
- 2. Great works are preformed not by strength but by perseverance.
- 伟大工作的完成,不是凭力量,而是凭毅力.
- 3. This is also preformed on covered surfaces a stacked assembly : substrate - pre - form - die.
- 在叠层的组装工艺中,比如基板 - 焊片 - 芯片,即使有部分表面被盖住了,这种气氛同样有效.
- 4. Preformed hole allows for convenient tagging.
- 预制的孔使得标记简单方便.
- 5. They preformed meritorious deeds in the fight to defend the frontiers of our motherland.
- 他们在保卫祖国边疆的战斗中立了功.