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to phrases
常冻
meteorol.
permanently frozen ground
soil.
permafrost
;
pergelisol
;
permagel
常
年
冻
结
gen.
permafrost
常冻:
8 phrases
in 6 subjects
Agriculture
3
Animal husbandry
1
Engineering geology
1
General
1
Reproductive biology
1
Technology
1
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