purposeful
[ˈpɜ:rpəsfl]
adj.
有目的的，故意的;
意志坚强的，果断的;
有意义的，意味深长的;
重大的;
adv.
果断地，有明确目标地;
例句:
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Therefore, tools are mirrors of purposeful human consciousness.
来自SA
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Purposeful work is an important part of the regime for young offenders.
使从事有意义的劳动是管理少年犯的重要方法。
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Her purposeful stare showed she meant business.
从她坚定的眼神可知她是认真的.
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She had a purposeful air, and it became evident that this was not a casual visit.
她一副无事不登三宝殿的神情，很明显，这不是一次随意造访。
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What we should be worried about is purposeful VIOLENCE.
来自SA
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They stood together in a small, purposeful group.
来自NEWYORKER