这对中国的安全机关提出了巨大挑战。
This is a massive challenge for the authorities here in China to deal with .
的历史和文化价值的网站提出了巨大挑战，在规划新的建设。
The historical and cultural value of the site presented a great challenge for the planning of the new building.
研究人员说，研究结果对养老金和照顾老年人提出了巨大挑战。
The researchers said the findings posed big challenges for pensions and care for elderly people.
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