adj. 1.有效(力)的，灵验的；显眼的，〔美国〕生效的，被实施的；【军事】有战斗力的。 2.【经济学】实质上的；有实价的 (opp. potential, nominal)。 3.【军事】精锐的。 短语和例子 effective horsepower 【物理学】有效马力。 effective range 有效射程。 an effective shot 命中(弹)。 an effective landing area 【航空】安全降落区。 the effective wind 平均风速。 effective segregation 【生物学】正分离。 effective coin [money] 硬币。 the effective strength of an army 军队的战斗实力[有生力量]。 be far from effective 很不得力。 become effective 〔美国〕(法令等)生效。 take effective measures 采取有效措施。 n. 【军事】 〔pl.〕 现役兵额，有生力量；精兵。 adv. -ly 1.有效地，有力地。 2.实际上。 n. -ness 有效；有力。
producing or capable of producing an intended result or having a striking effect; "an air-cooled motor was more effective than a witch''s broomstick for rapid long-distance transportation"-LewisMumford; "effective teaching methods"; "effective steps toward peace"; "made an effective entrance"; "his complaint proved to be effectual in bringing action"; "an efficacious law" 同义词：effectual, efficacious,
existing in fact; not theoretical; real; "a decline in the effective demand"; "confused increased equipment and expenditure with the quantity of effective work done"
able to accomplish a purpose; functioning effectively; "people who will do nothing unless they get something out of it for themselves are often highly effective persons..."-G.B.Shaw; "effective personnel"; "an efficient secretary"; "the efficient cause of the revolution" 同义词：efficient,
exerting force or influence; "the law is effective immediately"; "a warranty good for two years"; "the law is already in effect (or in force)" 同义词：good, in effect, in force,
works well as a means or remedy; "an effective reprimand"; "a lotion that is effective in cases of prickly heat"
ready for service; "the fort was held by about 100 effective soldiers"
例句与用法
1.
Bank communications become more effective . 银行的宣传变得效果更强。
2.
They thought their acting was so effective . 他们自认为演技十分感人。
3.
The mudstones provide an effective seal . 此泥岩提供了有效的封闭。
4.
Amines and diamines are particularly effective . 胺和二胺是特别有效的。
5.
We need an effective opposition . 我们需要一个能起作用的反对党。
6.
Social control was generally effective . 社会制约一般是有效的。
7.
Surface bombardments had nowhere been effective . 海面舰只炮击也毫无建树。
8.
The most effective defense is offence . 最有效之防御乃为攻击。
9.
This medicine is effective if used within three years . 这种药三年以内有效。
10.
Oxytetracycline is effective against b anthracis . 土霉素对炭疽杆菌是有效的。
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