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N-VAR
努力;气力；精力
If you make an effort to do something, you try very hard to do it.
例句
He made no effort to hide his disappointment...
他毫不掩饰失望之情。
Finding a cure requires considerable time and effort.
找到治疗的办法需要大量的时间和精力。
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N-UNCOUNT
吃力;费力
If you say that someone did something with effort or with an effort, you mean it was difficult for them to do.
例句
She took a deep breath and sat up slowly and with great effort...
她深吸一口气，费力地慢慢坐起身来。
With an effort she contained her irritation.
她努力强压住了怒火。
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N-COUNT
（为达到某一目的的）有组织的行动，一系列活动
An effort is a particular series of activities that is organized by a group of people in order to achieve something.
例句
...a famine relief effort in Angola.
在安哥拉进行的饥荒救济行动
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N-SING
费力的事;困难的事;劳神的事
If you say that something is an effort, you mean that an unusual amount of physical or mental energy is needed to do it.
例句
Even carrying the camcorder while hiking in the forest was an effort.
在森林中徒步旅行时，即便带的是便携式摄像机也非常费力。
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PHRASE
尽力；尝试；勉为其难
If you make the effort to do something, you do it, even though you need extra energy to do it or you do not really want to.
例句
I don't get lonely now because I make the effort to see people.
我现在不觉得孤独了，因为我尝试着与人交往。
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PHRASE
勇气;决心
If you do something difficult or painful by an effort of will, you manage to make yourself do it.
例句
It was only by a supreme effort of will and courage that he was able to pull himself together.
他全凭超凡的决心和勇气才使自己振作起来。
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PHRASE
值得努力去做
If you say that something is worth the effort, you mean that it will justify the energy that you have spent or will spend on it.
例句
Fortunately, the chore of leaf sweeping is well worth the effort.
幸运的是，干清扫落叶这个活儿是值得的。