The fires in this region have been part of the land management practices for hundreds, possibly thousands of years, and they are not necessarily immediately hazardous.

这种烧火开荒方式在当地的土地治理活动中延续了数百，甚至数千年。 它不会立刻招致必然的危害。

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And because domestic financial markets are very thin, most African countries hold a large part of their debt in foreign currency, which is especially hazardous when local currencies plunge.

因为国内财政市场十分薄弱，所以很多非洲国家大部分债款都是以外币的形式储存，如此一来，一旦本国货币贬值，情况就十分危险了。

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Hazardous substance had included for some piece part is impossible to unuse by present technological level and Samsung Electronics make every effort to improvement this technological limits.

一部分料件含有的有害物质是按现有的技术基准下是没有办法挽回，但是三星电子为了达到目标不懈的努力。

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"The hazardous materials part of the freight rail operations is always the most sensitive, " said Mineta, but emphasized that security has been tightened in the wake of the attacks.

CNN: Mineta: System 'safe' and 'secure'