通过自己的努力，他们获得了一份丰厚的个人报酬——他们从中了解到自己能够对付巨大的、几乎是不可逾越的困难，并且克服这些困难。
They received a substantial personal payoff from their efforts in the knowledge that they could tackle tough, almost insurmountable problems, yet overcome them.
因此，如何克服这些障碍并且缩小文化水平差异是非常困难的。
How to overcome all these obstacles and bridge the literacy divide is very difficult.
世卫组织承诺将在这些证据方面提供明确指导，并且与各合作伙伴合作，支持各国克服面临的实施性挑战。
WHO commits to providing clear guidance on this evidence and working with partners to support countries to overcome the implementation challenges.
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