NATO's continuous eastward expansion after the Cold War does not necessarily mean the unity and stability of the Northern Atlantic relations.

冷战后北约东扩的不断推进并不意味着北大西洋关系的团结与稳定。

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Longer term limitations also depend upon whether pipeline projects that are located exclusively in Canada proceed (such as the proposed Northern Gateway, the Trans Mountain expansion, and the TransCanada proposal to ship crude oil east to Ontario on a converted natural gas pipeline).

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Besides the Argan tree's various human uses, UNESCO notes, it has had an historical role as a buffer against northern expansion of the Sahara desert.

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Last week, she testified on Capitol Hill on behalf of Northern Rockies Ecosystem Protection Act or NREPA. If adopted, it would become the second largest wilderness expansion in U.S. history.

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