Construction of the Great Wall has a long history of the majestic immensity of the world rare miracle.

施工长城具有悠久的历史和壮丽的巨大的世界罕见的奇迹。

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On 8 June 2004, more than half the population of the world were treated to a rare astronomical event.

2004年6月8日，世界上一半以上的人有幸目睹了罕见的天文现象。

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The faint arrows, similar to the directional markings on a tactical map, are one of the rare carry-overs from his military world.

微小的箭头类似于战术地图上的方向标记，是他的军事世界中罕见的遗留物之一。

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And they are not rare. Bird Strike Committee USA gathers information about such incidents in the United States and around the world.

VOA: special.2009.04.01

So Roman slavery and the freedom of that was actually one way that a few people in the Ancient World recognized some kind of social mobility, which was very rare in the Roman Empire.

所以罗马奴隶制以及奴隶释放制,被古代部分人认为是,某种社会阶级流动，在罗马帝国很少见。

耶鲁公开课 - 新约课程节选

But if we look at the society that emerges, this Dark Age society that emerges from the ancient world of Mycenae, what you have is a rare human experience.

如果我们仔细观察这渐渐浮出水面的社会,这个从古代迈锡尼文明浮现出来的,黑暗时代的社会,你会得到一些相当宝贵的经验

耶鲁公开课 - 古希腊历史简介课程节选

However, there are only a handful of places in the world where rare earths are found in high enough concentrations to make extracting them commercially feasible.

FORBES: The Politics of Rare Earth

China currently produces 97% of the world's rare earths, vital in the manufacture of mobile phones and other high-tech products.

BBC: Greenland rare earths: No special favours for EU

From the 1960s until the 1980s, the Mountain Pass mine in California made the US the world leader in rare earth production, but it was later closed, largely due to competition with the elements imported from China.

BBC: US to build $120m rare earth research institute