In cases where there's no mention of limits on use, the best way to deal with it is to credit it and say that it's not for commercial purposes on your blog.
那么在这种情况下，作者提及了使用权限，最好的应对方法就是标明文章不是因为商业用途在你博文上出现。
Without permission from a world expo logo mark obligee, no one shall use the world expo logo mark for commercial purposes (including potential commercial purposes, hereafter the same).
未经世界博览会标志权利人许可，任何人不得为商业目的(含潜在商业目的，下同)使用世界博览会标志。
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