单位写得很清楚，你自己看啦。
Period  Trade Flow  Reporter  Partner  Code  Trade Value  NetWeight (kg)  Quantity Unit  Trade Quantity  Flag  
2006  Import  China  World  44 $6,460,065,009  N/A  1  N/A  0  
2007  Import  China  World  44  $7,979,567,025  N/A  1  N/A  0  
2008  Import  China  World  44  $8,023,379,057  N/A  1  N/A  0  
2009  Import  China  World  44  $7,255,433,724  N/A  1  N/A  0  
2010  Import  China  World  44  $11,234,862,742  N/A  1  N/A  0  
1


Estimated quantity/netweight shown in italics
Flag refers to quantity/netweight estimation:
0 = no estimation, 2 = quantity, 4 = netweight, 6 = both quantity and netweight  

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应该是美元，以前下的都是美元，否则uncomtrade上应该有特殊注明