If it can be synthesised, the ice will be about 25 percent less dense than the current lowest-density record-holder, developed by European researchers in 2014.

如果它能够被人工合成出来，那么其密度将比当前的记录持有者轻上25%——目前的最低密度冰由欧洲研究人员于2014年制成。

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Seattle, for example, has the lowest density of children of any city in America.

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This metropolitan area, anchored by universities and technology-oriented industries, is among the lowest-density regions in the country, with under 1, 700 persons per square mile, slightly less than Charlotte, Nashville and Atlanta.

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