英 [ˌefɪˈkeɪʃəs] 美 [ˌefɪˈkeɪʃəs]
adj. 有效的；灵验的
efficacious /ˌɛfɪˈkeɪʃəs/
形容词 Something that is efficacious is effective. 有效的
The nasal spray was new on the market and highly efficacious.
这种鼻腔喷雾剂是市场新品，非常有效。
marked by qualities giving the power to produce an intended effect
written propaganda is less efficacious than the habits and prejudices...of the readers ; the medicine is efficacious in stopping a cough
... efficacious 有效的；灵验的 efficiently 有效地；效率高地（efficient的副词形式） efficaciously 有效地；灵验地 ...
另外，如果你还是恐怕甲方不输钱，岂不白白浪费时间兼蚀抽水，我可建议你，一个很抽象但次次灵验(Efficacious)的本领，就是乙方要储足精神，在最好作战状态，而甲方则想办法令自己增加输钱的机会，例如通宵不睡眠，不剃须，先喝一点酒，用一...
... controversial：有争议的 efficacious：有用的 motley：混杂的 ...
... [intelligence] 聪明 [efficacy;efficacious] 灵验;有效验 [coffin containing a corpse] 盛有尸体的棺木 ...
efficient 有效率的；有能力的；生效的
efficiently 有效地；效率高地（efficient的副词形式）
efficaciously 有效地；灵验地
efficacy 功效，效力
The nasal spray was new on the market and highly efficacious.
这种鼻腔喷雾剂是市场新品，非常有效。
One such factor is the evolution of downsizing into a powerful business myth: managers simply believe that downsizing is efficacious.
其中一个因素就是缩小规模已经演变成一个强大的商业神话：经理们单纯地相信缩小规模是有效的。
They hope the new drug will prove especially efficacious in the relief of pain.
他们希望这种新药能在缓解疼痛方面产生特效。
"We have to make sure that the compound will be sufficiently efficacious to be used in the clinical setting, it has to be safe, and again we can make the drug sufficiently cheaply that it will be appropriate for the use in the clinical setting."
VOA : standard.2010.04.05
So she's - I trust her to guide me to the treatment that will be the most efficacious.
If its as efficacious as a marketed mAb, then of course as it will also have big cost-of-goods advantages.
FORBES: Innovation Snapshot: Macrocyclic drugs to unlock new therapeutic targets
Of course, the most efficacious solution to living in a water-poor region is simply to move, which is what de Villiers himself did.