1. effective 有效的/有用的＝successful/useful/workableThe drug is effective against the disease.这个药能有效抵抗这个疾病。The law is no longer effective.这条法律已经失效。Which method is the most effective?那个方法最有用啊？Teamwork has taught me the importance of collaboration and effective communication.团队合作教会了我协作和有效沟通的重要性。2. efficient adj. 有效率的近义词 fast/quick/productiveJack was efficient at work. He finished everything way before the deadline.Jack工作方面很高效。他在截止日期之前很久就完成了所有工作。We need to get an assistant who's capable and efficient.我们需要找一个能力强且高效的助理。The new machine is efficient. It can produce 100 units in a day.新机器很高效。一天能产出100件。
