adj.有效的；生效的；實(shí)際的

Advertising is often the most effective method of promotion. 做廣告往往是最有效的推銷方法。

When does the new system become effective? 新制度何時(shí)生效？

Her brother is the king, but she is the effective ruler. 她的兄弟是國王, 但她才是實(shí)際的主宰者。

Last year saw a decline in the effective demand for steel. 去年,鋼鐵的實(shí)際需求下降了。

effective強(qiáng)調(diào)產(chǎn)生實(shí)際效果的能力,無比較級(jí)和最高級(jí)。

adv.事實(shí)上；有效地

adj.無效的；無能的；效率低的

n.有效性；效力

adj.有成本效益的；劃算的

n.低效率；無效

adv.無效地；無用地