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
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。
A clear and strong positioning plays an important role in the competition, undoubtedly it will help brands stand out in numerous western fast food brands.
一个清晰有力的定位无疑在竞争中扮演者重要的作用，帮助品牌在众多西式快餐品牌中脱颖而出。
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