【Effetive】
effective a. 有效的,有影响的
例: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.
登广告往往是最有效的推销方式。
拓展:effect n. 影响,结果;effectiveness n. 有效性