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to phrases
man-made source
el.
人为根源
tech.
人为来源
;
人工放射源
water.res., ecol.
人为污染源
man-made
radioactive
source
oil
人工放射源
man- made source
:
8 phrases
in 4 subjects
Ecology
2
Oil / petroleum
1
Technology
2
Water resources
3
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