Now, speeds like that are pretty unusual, hundreds of times faster than the regular movement of glaciers, but you can actually see glacier move during these surges, though it is rare.

现在，这样的速度是很不寻常的，比冰川的正常移动速度快几百倍，但是你可以看到冰川在这些涌动中移动，虽然很少见。

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They have replanted many areas with rare and unusual plants.

他们在很多地方重新种上了稀有罕见的植物。

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While it may sound like an advantage to many, people with this rare condition often find their unusual ability burdensome.

虽然这很多人听起来像是优势，但患有这种罕见疾病的人往往会觉得这种独特能力是负担。

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In rare, but not unheard of, cases, some people begin to have those unusual biological processes and then return to the normal biological processes and can talk about what was happening in the unusual biological processes.

在少见,但并非从未听闻的,情况下,有些人开始,经历那样一些不正常的生理过程,然后回归正常的生物学过程,他们可以谈论,在那个不正常的生物过程里发生了什么

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You have a full monarchy in the sense that both-- we in America talk about the separation of church and state, that is a very rare and unusual thing in the history of the world.

他有一个完全政教合一的君主政权,在美国政教是分离的,这在世界历史上很少见

耶鲁公开课 - 古希腊历史简介课程节选

The collection also has some extremely rare and unusual maps, most notably some in the form of playing cards.

BBC: Rare Norfolk maps added to county archive

With the passing of stamp and butterfly collecting into the obscurest realms of irredeemable geekdom, accumulating (and drinking) rare, unusual and generally very old whiskies has emerged as one of the more surprising--if less than headline-generating--trends of the 21st century.

FORBES: World's Most Expensive Whiskies

"We are trying to take an unusual or rare event and make it more common, " says Haynes.

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