To clarify the operation of the principle, we have prepared this simple guide on the territorial source principle of taxation.

为清楚说明如何运用这项原则征税， 我们拟备了这本《 地域来源征税原则简介》 。

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The Tunisian government warned of "immediate and disastrous consequences" to bilateral relations and said the "serious" attacks are likely to force Tunis to take "severe" measures such as reporting the violations to the U.N. secretary general in order "to defend its territorial integrity, " the source told the news agency.

CNN: STORY HIGHLIGHTS