pernicious influence meaning in English

流毒甚广

This event had a pernicious influence on society
这件事情对社会造成了有害的影响。
The uncertainty of planar constraints causes overconstraints , which have no influences in the ory on smooth work of a machine with planar linkages , to form obstruction in fact and bring about a series of pernicious influences on the performance of the machines , especially on their dynamic behavior and the quality
因此，本文以平面连杆机构为研究对象，以高效、高稳定性及低成本为主要目标，对机械中的约束与过约束、自调机理与自调结构、运动副误差对平面连杆机构约束不确定性的影响程度以及无过约束机构的设计理论与方法进行了深入、系统的研究。