role positioning 角色定位
social role positioning 社会角色定位
Government role positioning 政府经济职能定位
Positioning and role 定位与作用
I have already stated that positioning of a product or service plays an important role in its success in the chosen market.
我已经指出，定位，产品或服务中发挥着重要作用的成功所选择的市场。
QTL root positioning plays an important role in study of genetic mechanisms. In rice, many QTLs related with roots' characteristics are positioned using different groups.
根系QTL定位对深入研究根系遗传机制有重要作用。在水稻上，已利用不同群体定位了许多与根系性状相关的QTL。
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