1. 形容詞
   有效率的, 效率高的
   有效的
   收效大的
   (直接)生效的
   有能力的, 能勝任的
   能幹的
   efficient in ...(事):
   在...方面有效率的
   在...方面有效的
   efficient at ...(動詞ing ...):
   

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   同義字詞
   effective,effectual,efficacious,fruitful,operative,potent,productive
   

例句

1. Not having an efficient strong wind stance.
2. I guess I'm a prolific and efficient writer.
3. There is nothing efficient or fair about that.
4. An efficient transport system can reduce land waste.
5. Dolphins are incredibly graceful and efficient swimmers.
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