نتایج جستجو برای: recall
تعداد نتایج: 47173 فیلتر نتایج به سال:
Journal:
:Current Biology
2008
Nigel Williams
7,000 plant species for food but today around 20 species provide 90 per cent of the global human diet. Of the 7,100 varieties of apple recorded in America a century ago, 6,800 have now been lost. And there are worries, for example, that the maize staple in southern Africa may be under increasing challenge from climate change. Svalbard provides " the last line in the defence against the extincti...
Journal:
:ACM Transactions on Information Systems
2013
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