d o l shu yu qi kan ma
e e s qi kan shu yu s c i
e i qi kan shu yu c s s c i
e i shu yu a b c qi kan
e i shu yu qi kan ma
e n e r g y qi kan shu yu s c i
f u e l shu yu e s i qi kan
f o r e s t qi kan shu yu s c i
发展 fa zhan qi kan shu yu
钢铁 gang tie qi kan shu yu
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