The follow-up study in 2008 shows that longtermsustainability is currently regarded as the most important challenge to most OER initiatives.
2008年的继续研究表明,对于大多数OER举措来说,目前人们认为最重要的挑战是长期可持续性。
2
There are also concerns about the long-termsustainability of farming practices encouraged by the Green Revolution in both the developed and the developing world.
对于发达国家和发展中国家而言,绿色革命鼓励的农业实践的长期可持续性也令人担忧。
3
In the United States we're also continuing to refine our policies to improve the long-termsustainability and strength of our economy.