adj.需要努力的；显示努力的；充满努力的
make the effort───尽力；付出努力
unremitting effort───不懈努力
branding effort───品牌努力
concerted efforts───共同努力
undisguised effort───毫不掩饰的努力
careful effort───谨慎的努力
shared efforts───共同的努力
untiring effort───不懈的努力
minimal efforts───最小的努力；轻而易举
relief efforts───救灾工作
This structured knowledge is built by years of effortful study.───结构化知识非历经数年苦功不可得。
ten years of effortful study to become an expert───成为一名专家=十年的时间+刻苦学习
Inferential activity is likely only when consumers are motivated and able to engage in effortful cognitive processes.───只有当消费者被激励并能够经历费力的认知过程时，推理活动才可能发生。
But when you return to this question at the end of an inquiry you may find that your breathing feels deeper, fuller, or less effortful.───可是当你在体验结束后重新回到这个问题上来，你将发现你的呼吸更深、更充盈并且不再过分刻意努力。
Willpower is basically the effortful behavioral systems that inhibit behaviors that have been called to mind.───意志力基本上是付出努力的抑制这种被称为想起行为系统的行为。
Effortful study means that someone consistently try to push slightly higher than her current limit of competence.───这里的刻苦学习是指一个人不断地突破她目前能力的极限。
Anecdotal accounts suggest that effortful learning may also help some patients.───还有一些消息指出，专注学习或许也能帮助一些病患。
"You never sing enough, " she added. Her smile to me was effortful and pinched.───“你从来就不多唱几句，”她又说，冲我微笑一下，显得牵强而痛苦。
an effortful attempt to attain a goal.───为了达到目标而努力。