1. 形容詞
   有效的, 生效的
   起作用的
   有效率的, 有力的
   實際的, 事實上的
   effective against ...(人事物):
   對抗...有效的
   (事物)effective on ...(事物):
   對...有效應的
   effective in ...(動詞ing ...):
   對做...有效的
   

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   同義字詞
   effectual,efficacious,efficient,fruitful,operative,potent,productive
   cogent,compelling,conclusive,convincing,decisive,forceful,persuasive,satisfying,strong,telling
   actual,concrete,de facto,existent,factual,genuine,real,true,very
   

例句

1. Just watch out for those effective Lepidoptera.
2. Danny Elfman's score is also subtly effective .
3. The design of effective instruments is critical.
4. The Part 503 regulations became effective in 1993.
5. I had this joke played on me and it was quite effective .
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