operative

adj. 有效的；运转着的；从事生产劳动的

n. 侦探；技工

中文词源

operative 运转的，操作的

来自operate,运作，操作。

operative (adj.): "producing the intended effect," early 15c., from Old French operatif (14c.) or directly from Late Latin operativus "creative, formative," from operat-, past participle stem of operari (see operation). Weakened sense of "significant, important" is from 1955.
operative (n.): "worker, operator," 1809, from operative (adj.); sense of "secret agent, spy" is first attested 1930, probably from its use by the Pinkerton Detective Agency as a title for their private detectives (1905).

1. Her aggressive moods alternated with gentle or more co-operative states.: 她情绪多变，时而咄咄逼人，时而又显得温柔平和或乐于合作。

2. The Youth Training Scheme was operative by the end of 1983.: 青年培训计划一直持续到1983年底。

3. They decided a housing co-operative was the way to regenerate Ormiston Crescent.: 他们最终决定通过住房合作社来重建奥米斯顿月牙街。