24. What does the man say threatens the existence of the railways?

问题24. 男人说威胁铁路存在的是什么？

However, climate change is threatening the existence of such reefs.

然而，气候变化正在威胁着这些珊瑚礁的存在。

I mean, ISIS really did at one point threaten the existence of Iraq and...Yeah. ...The Kurdistan region.

ISIS曾经对伊拉克的存在构成威胁。对。而且也对库尔德斯坦地构成威胁。

But downstream, Egyptians are worried it will cut their water supply and threaten the existence of their country.

但下游的埃及人担心大坝将切断他们的供水，威胁国家生存。

" Or the removal, " persistently continued Ignatius Nikiforovitch, " of those depraved and savage people who threaten the existence of society" .

“或者驱逐，”伊格内修斯·尼基福罗维奇坚持继续说道，“那些威胁社会存在的堕落和野蛮的人”。

But we are now knowledgeable enough to reduce many of the risks that threatened the existence of earlier humans, and to improve the lot of those to come.

但我们现在的知识足以减少许多威胁早期人类生存的风险，并改善未来人类的命运。