They have two main purposes and one of them is that they want to encourage green travel through it.

他们有两个主要目的，其中之一，是希望通过它提倡绿色旅行。

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There are many concerns. One of them is that avoided deforestation may not be permanent—especially where there is a risk of climate-induced forest dieback.

目前还存在着重重顾虑，其中之一是被避免的毁林活动或许并不能一劳永逸，特别是在那些存在由气候导致的森林梢枯病风险的地区，情况更是如此。

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There are a lot of reasons astronauts haven't moved beyond the harbor lights of low-Earth orbit in nearly 40 years, but one of them is that we haven't had the machines to take us anywhere else.

近40年里宇航员一直没能走出近地轨道的“港口灯标”，原因有很多，其中之一是缺乏将我们送到其他地方的机器。

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"There are several problems with this notion of a failed state," "One of them is that somehow in Mexico,all of a sudden, the government has become heavily corrupted by cartels as if there wasn't corruption in the past.

VOA: standard.2009.12.18

And one of them is right above on that page, and I read it a little earlier: "thinking nothing and sweating."

其中一部分就在那页的上端，之前我才读过：,“脑子里一片空白,汗流个不停“

耶鲁公开课 - 1945年后的美国小说课程节选

One of the things about these plasmids that makes them very useful is that their entire base pair sequences is known.

质粒之所以有用,其中一个原因就是,它的全部碱基序列都是已知的

耶鲁公开课 - 生物医学工程探索课程节选

One of them is that wave 4 should not trade below the apex of wave 1.

FORBES: Elliott Waves Warn Of Big Tumble Ahead For Stocks

One of them is that the cost of starting web-based businesses will fall even further.

ECONOMIST: Start-ups will help restart America��s economy

One of them is that it is not easy to work with outsiders.

ECONOMIST: The love-in