Although the origins are uncertain, experts think that this is largely due to the high level of volcanic activity in the area.

尽管起源还不确定，专家认为这主要是由该地区频繁的火山喷发所造成的。

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Such courses, Hacker argues, are a remedy for the numerical illiteracy of adults who have completed high-level math like algebra but are unable to calculate the price of, say, a carpet by area.

哈克认为，这样的课程可以弥补成年人在数字方面的盲点，这些人虽然已经学习了像代数这样的高等数学，但却无法按面积计算出一块地毯的价格。

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Public theaters during this time were usually three floor levels high and were built around a stage area where the actors performed.

VOA: special.2010.01.06

You handle them very special in terms of being extra careful in a very high ventilation area, in hoods is how you handle them.

在使用它们的时候你需要格外小心,必须在通风条件非常好的地方，在通风柜中才行。

麻省理工公开课 - 化学原理课程节选

And then the inner shrine is the holiest area: it's accessible only to the holiest member of the nation, the high priest.

更内部的神殿是最神圣的区域：,只有这个国家最神圣的人，大祭司可以进入。

耶鲁公开课 - 旧约导论课程节选

"It has been a high-growth area, a high-demand area, particularly in the U.S. and to some extent globally, " says John Lewis, vice president of public affairs for the Association of Clinical Research Organizations.

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Thus moving assembly from a low wage area to a high wage area does not mean, necessarily, the creation of highly paid jobs.

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"It will have a great impact on people from the area because Thanet is a high unemployment area and there is not much chance of people finding jobs, " he said.

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