有效的的用法和樣例：
例句
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有效的防衛是不待對方導彈擊中我們而先行將其攔截。
Effective defence is a matter of intercepting their missiles before they can reach us.
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做廣告往往是最有效的推銷(xiāo)方法。
Advertising is often the most effective method of promotion.
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商業(yè)電視是有效的廣告宣傳工具。
Commercial television is an effective medium for advertising.
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這一婚姻關(guān)系是有效的。
The marriage was held to be valid.
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不能根據一兩個(gè)病例就得出該藥是否有效的結論。
You cannot generalize about the effects of the drug from one or two cases.
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那個(gè)馴馬師掌握行之有效的馴馬技巧。
That trainer knows how to get results from his horses.
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