To avoid economic downturn

How to avoid careless omission in course of editing manuscripts of sci-tech periodicals;

科技期刊如何避免编辑疏漏

Discussion on how to avoid negative effect in athletic sports;

浅谈如何避免体育运动中的负效应

Suggestion to the Fabrication of the Laws of Avoidance and Reduction of Packaging Waste Materials;

关于制定《避免、减少包装废弃物法》的立法建议

A case study shows that this approach can not only realize the collision-free but also improve the efficiency of the free-form surface machining.

针对平底刀加工复杂自由曲面,从刀具与曲面的干涉特征分析入手,提出了"无刀底干涉→无曲率、刀杆干涉"的刀具干涉避免策略,并阐述了相应的刀轴矢量调整方法。