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man demonstrates how to set up a mosquito bed net to protect from getting malaria

标签: man,demonstrates,how,to,set,up 浏览: 2

happy children from benin africa

标签: happy,children,from,benin,afri 浏览: 1

afro women from parakou benin africa

标签: afro,women,from,parakou,benin, 浏览: 1

man from east timor face close up

标签: man,from,east,timor,face,close 浏览: 2

laboratorian was shown looking through a microscope at samples collected from the field

标签: laboratorian,was,shown,looking 浏览: 1

hematologist as he examined blood samples taken from patients

标签: hematologist,as,he,examined,bl 浏览: 2

extracted a blood sample from a resident of the town of yambuku zaire

标签: extracted,a,blood,sample,from, 浏览: 2

irrigiation improves farming a feeder channel diverts water from the mpmemba stream

标签: irrigiation,improves,farming,a 浏览: 2

the cows of gabala suffered from poor health before farmers improved their management

标签: the,cows,of,gabala,suffered,fr 浏览: 2

team volunteers as they marched from house to house in search of any smallpox cases

标签: team,volunteers,as,they,marche 浏览: 2

team members took when traveling from village to village throughout the waterway traversed nation

标签: team,members,took,when,traveli 浏览: 2

team epidemiologist was going from house to house

标签: team,epidemiologist,was,going, 浏览: 2

female heavy machinery operator talks to a colleague from her seat inside an excavator

标签: female,heavy,machinery,operato 浏览: 2

nigerian ecologist from assessment team points out a detail on an aerial image

标签: nigerian,ecologist,from,assess 浏览: 2

scientists assess the ashfall from a recent eruption of ol doinyo lengai volcano tanzania

标签: scientists,assess,the,ashfall, 浏览: 1