本文就小提琴教学与演奏中，生理机能及演奏心理中的“动”与“静”之间的表现及辩证关系，作初步的分析研究。

This article makes a preliminary analysis and study of the expressions between "motion" and "motionlessness" in a violinist's physical function and playing psychology and their dialectical relations.

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机械密封主要的是靠装在轴上的动环与固定在泵壳上的静环之间端面作相对运动而达到密封的目的。

Mechanical seals are on the main shaft is installed in the dynamic ring in the pump shell and fixed up the static ring for relative movement between the face and achieve the purpose of sealing.

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