至少有20个国家使用气球飞艇——无论是美、英、法这样的全球军事强国，还是爱尔兰、巴基斯坦、波兰、阿拉伯联合酋长国这样稍小的地区性势力。

At least 20 countries use blimps—both global military powers, such as America, Britain and France, and smaller regional ones, including Ireland, Pakistan, Poland and the United Arab Emirates.

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这就是美国国际开发署与凯西卢格全球食品安全法的职权范围。

That is where the U.S. Agency for International Development and the Casey-Lugar come in.

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然而由于世界各国的知识产权法不尽相同，全球公有领域作品的标记工作充满挑战。

Labelling works as part of the global public domain is challenging as different countries have different intellectual property laws.

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