cease to be effective 失效 ; 失去效力
be effective in 在……有效
proved to be effective 证明是有效的
be effective against 对抗…很有效 ; 有抗……效力的
be legally effective 发生法律效力
not be effective 不见效
to be effective 能有效
Should Be Effective 应该会有效果
fail to be effective 效率和成效低
The antivenom that cures the bite of one kind of snake may not be effective for another kind of snake.
VOA: special.2009.05.05
If you or I buy it, it costs $51 per dose, you need three doses to be effective.
如果你或者我购买它,每支将花费五十一美元,你需要购买三支才会起效
We want to share things, but we want to get more scientific about how we share things and that means-- and we want to be effective.
我们才想要分摊风险,但我们得用更科学的方式,也可说是更有效率的方式-,来分摊风险。
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