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本帖最后由 细胞海洋 于 2014-4-14 07:55 编辑 " y2 z& Q6 I% M/ q& r/ b5 w$ h: b; H
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COVER A sugar cane cutter near the town of El Paisnal, El Salvador, at dawn. Agricultural workers in El Salvador and many neighboring countries have been suffering from a chronic kidney disease that has no obvious cause, but many researchers believe it is linked to heat and dehydration. See page 143. Photo: Malcolm Linton; B/ w- \+ p! v0 R0 Z2 Z4 x
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发表于 2014-4-12 23:05
