- If your email outlining a plan to reduce office paper waste resulted in a 20 percent reduction in paper use, that means your plan was effective: it did what you wanted it to do.
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- adj. 有效的，起作用的；有影响力的
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1. take effective measures to do sth
采取有效的措施去做某事
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2. drugs that are effective against cancer
治疗癌症的有效药物
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3. Aspirin is a simple but highly effective treatment.
阿司匹林药片治疗方法简便，效果却非常显著。
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4. He has now taken effective control of the country.
他目前已实际上控制了这个国家。
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5. The new speed limit on this road becomes effective from 1 June.
这条路的新限速规定自 6 月 1 日起生效。
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6. to check the effectiveness of the security system
检查安全系统的有效性
- effective (adj.) late 14c., "serving to effect the intended purpose," from Old French effectif, from Latin effectivus "productive, effective," from effect-, stem of efficere "work out, accomplish" (see effect (n.)). Of military forces, "fit for action or duty," from 1680s.
ef·fect·ive ★ / ɪˈfektɪv ; NAmE ɪˈfektɪv / adjective 1 ★ producing the result that is wanted or intended; producing a successful result 产生预期结果的；有效的 ◆ Long prison sentences can be a very effective deterrent for offenders. 判处长期监禁可对违法者起到强有力的威慑作用。 ◆ Aspirin is a simple but highly effective treatment. 阿司匹林药片治疗方法简便，效果却非常显著。 ◆ drugs that are effective against cancer 治疗癌症的有效药物 ◆ I admire the effective use of colour in her paintings. 我很欣赏她绘画作品中的色彩效果。 OPP ineffective ☞see also cost-effective 2 [only before noun ] in reality, although not officially intended 实际的；事实上的 ◆ the effective, if not the actual, leader of the party 虽未居其位却实际上是党的领导人 ◆ He has now taken effective control of the country. 他目前已实际上控制了这个国家。 3 ( formal) (of laws and rules 法律和规则 ) coming into use 生效的；起作用的 ◆ The new speed limit on this road becomes effective from 1 June. 这条路的新限速规定自 6 月 1 日起生效。 ▶ ef·fect·ive·ness ( also less frequent ef·fect·iv·ity / ɪˌfekˈtɪvɪti ; NAmE ɪˌfekˈtɪvɪti / ) noun [uncountable ] ◆ to check the effectiveness of the security system 检查安全系统的有效性 ef·fect·ive / ɪˈfektɪv ; NAmE ɪˈfektɪv / ef·fect·iv·ity / ɪˌfekˈtɪvɪti ; NAmE ɪˌfekˈtɪvɪti /
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