Vaccination for smallpox is efficacious. 种牛痘防天花是有效的。
Example is always more efficacious than precept. 身教胜于言教。
Vaccination is efficacious in preventing smallpox. 种痘对预防天花很有效。
efficacious
[ adj ]
marked by qualities giving the power to produce an intended effect
<adj.all> written propaganda is less efficacious than the habits and prejudices...of the readers the medicine is efficacious in stopping a cough
producing or capable of producing an intended result or having a striking effect
<adj.all> an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation effective teaching methods effective steps toward peace made an effective entrance his complaint proved to be effectual in bringing action an efficacious law
Efficacious \Ef`fi*ca"cious\, a. [L. eficax, -acis, fr. efficere. See {Effect}, n.] Possessing the quality of being effective; productive of, or powerful to produce, the effect intended; as, an efficacious law.
Syn: See {Effectual}. -- {Ef`fi*ca"cious*ly}, adv.
His burgundy glass is on permanent show at New York's Museum of Modern Art. As luxuries go, Riedel's pingingly delicate and efficacious handblown Sommelier glasses are not that expensive.
Therefore it would seem efficacious to name the child Troy or Ulysses (as in Homer), Ulalume (as in lamentation), or even Ultima (as in the end).