efficacious, effective, (of a prediction) accurate quick, sharp 
wirksam wirksam 
efficace efficace 
efficace efficace 
eficaz eficaz efficacious, effective, (of a prediction) accurate 8 灵验 [靈驗] língyàn (accurate-tested) efficacious, effective, (of a prediction) accurate: 这种药非常~. This medicine is highly efficacious. || 天气 预报 (yùbào) 果然~. The weather forecast turned out to be accurate. ' quick, sharp 9 灵 [靈] líng (sharp, quick) quick, sharp: 脑子~ quick mind || 鼻子~ quick nose || 这个办法~. This way works very well. '
Giải pháp mới của chúng tôi là thực tiễn và hiệu quả. 
Our new solution is practical and effective.
Unsere neue Lösung ist praktisch und effektiv.
ทางออกใหม่ของเรามีความเป็นประโยชน์และมีประสิทธิภาพ
我们的新解决方案是实用和有效的。