... concern oneself about sth. 忙于; 从事; 关心, 关切 concern oneself in sth. 忙于; 从事; 关心, 关切 concern oneself with sth. 忙于; 从事; 关心, 关切 ...
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Concern oneself with sth; indulge in sth 忙于某事物;沉溺于某事物 Work with other people for relative license and technical standard. 协助其他部门或人员完成资质认证及产品监检工作。
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