As a result, its use has been banned or restricted in many countries.

因此，许多国家已经禁止或限制使用这种物质。

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Stopping wild poliovirus transmission in endemic countries: Polio today is more geographically restricted than ever before.

阻断流行国家中野生脊灰病毒的传播：脊髓灰质炎如今在地域上受到的限制比以往任何时候都更大。

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Headscarves that do not cover the face are still allowed in these countries, although they are restricted in schools and public buildings.

在这些国家不蒙脸的头巾还有允许的，虽然它们在学校和公共建筑内受到限制。

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Increasingly, couples denied treatment in more restricted countries, such as the UK and France, are prepared to travel long distances to find doctors who are prepared to push the boundaries.

BBC: Halting the fertility 'fraudsters'

Rice prices are climbing especially fast, as several rice-producing countries have restricted exports, fearing domestic shortages.

ECONOMIST: Feeding its own people more cheaply

However, given the very difficult situation in Libya and Egypt we have temporarily restricted access in both countries.

FORBES: Google Blocks Bizarre Anti-Islam Film Trailer On YouTube In Egypt and Libya