effective
[i'fektiv]
adj.有效的, 生效的, 实际的
例句与用法：
This country lacks an effective party of the centre.
这个国家缺少一个能起作用的中立党派。
The president promised swift and effective retribution against the terrorists.
总统答应会迅速有效地惩罚恐怖分子。
Advertising is often the most effective method of promotion.
做广告往往是最有效的推销方法。
Effective defence is a matter of intercepting their missiles before they can reach us.
有效的防卫是不待对方导弹击中我们而先行将其拦截。
Commercial television is an effective medium for advertising.
商业电视是有效的广告宣传工具。
Their efforts to improve the production have been very effective.
他们提高生产力的措施卓有成效。
That's rather an effective use of color.
这种使用颜色的手法效果相当好。
When does the new system become effective?
新制度何时生效？
词形变化：
名词: effectiveness |
详细释义：
a.
1. 有效的[(+against/in)][+to-v]
Window screens are effective in keeping out mosquitoes.
纱窗能有效地挡住蚊子。
2. (法律等)生效的, 起作用的[Z]
A bill passed by congress becomes effective as soon as the President signs it.
国会通过的法案一经总统签署立即生效。
3. 给人深刻印象的, 有力的
That's rather an effective use of color.
那样使用颜色效果甚佳。
4. 实际的, 事实上的[Z]
Although there is a parliament, the army is in effective control of the country.
虽然有议会存在, 但军队实际上控制着这个国家。
5. 有战斗力的[Z]
n.
实际可作战的部队(或士兵)[P]