词典释义：
a vigorous or determined attempt
努力
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in an effort to reduce inflation, the government increased interest rates .为了减缓通货膨胀，政府提高了利率。
the result of an attempt
成果，成就
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he was a keen gardener, winning many prizes for his efforts .他热衷于园艺，并因此获得了许多成果奖。
[mass noun]strenuous physical or mental exertion
奋力，勉力
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the doctor spared no effort in helping my father .医生不遗余力地救护我父亲。
〈技〉 作用力。
[with modifier]the activities of a group of people with a common purpose
（为某一共同目的进行的）共同努力
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the war effort .为战争作出的共同努力。
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make an effort to do sth = make efforts to do sth 努力做某事
真题例句：
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make an effort to do = make efforts to do 努力做某事
真题例句：
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without (any) effort 无需(任何)努力
真题例句：
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with ( + 形容词 + ) effort 费力地
真题例句：
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spare no effort to do sth 不遗余力做某事
真题例句：
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save time and effort 节约时间和精力
真题例句：
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a waste of time and effort 浪费时间和精力
真题例句：
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a rescue effort 一场救助工作
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"late 15th cent.: from French, from Old French
