英语翻译Although at times,learning a language was frustrating,__

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英语翻译
Although at times,learning a language was frustrating,_________(但却非常值得努力)
It is not easy to do scientific research_______________(不仅需要时间、精力、和经费,还需具有自制力和奉献精神)

Although at times,learning a language was frustrating,it was worthwhile to work hard at .
It is not easy to do scientific research,which needs not only time ,energy and fund ,but also the ability of self control and contribution .

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