A mathematical model for determining the thermal influence zone of buried hot oil pipeline was developed and solved numerically by the finite element method.

建立了埋地热油管道热力影响区的数学模型，并用有限元法进行了求解。

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British officials privately concede that they are worried about retaining their influence from outside the euro-zone.

ECONOMIST: European financial regulation

This calls for a Turkish zone of political, economic and cultural influence, primarily among neighbours (many of them former Ottoman dominions) in the Balkans, the south Caucasus and the Middle East.

ECONOMIST: Turkish foreign policy

These countries have a strong interest in ensuring that, as the euro zone becomes more integrated, they do not lose their influence in debate or their part in decisions.

ECONOMIST: The euro crisis