词汇	自由半群
释义	自由半群医free semi-group
随便看	commodity by country system commodity-by-country system commodity by industrial origin commodity capital commodity card commodity chain commodity chain analysis Commodity Channel Index commodity character Commodity characteristic itself Commodity characters commodity chemical commodity chemicals commodity chemical wastewater commodity circulation commodity circulation channel commodity circulation channels commodity circulation commodity commodity circulation cost control commodity circulation efficiency commodity circulation expense commodity circulation expenses commodity circulation industry commodity circulation links commodity circulation modernization