高音，非线绕的琴弦通常不需要替换，即使已经生锈。
The upper, non-wound strings generally do not need replacing even if they appear rusted.
建立了绕椭圆柱面以等角速度旋转，又以变速度上升的非定常螺距的螺旋线方程。
A helix equation of time-varying pitch is established, revolving elliptic cylinder as equal angular velocity and rising as variable velocity at the same time.
本文从化学非平衡粘性激波层控制方程出发，用数值法计算了高超音速钝体绕流头部区流场(包括驻点线和音速线)。
In this paper, the nonequilibrium viscous shock layer equations have been used to calculate the hypersonic flows over blunt bodies in the fore-body region (including stagnation line and sonic line).
非视距声信号通常经过绕射到达基阵，根据广义费马原理，传播路径为一条短程线。
The NLOS sound signal usually arrives at acoustic array by diffraction, and the diffracted transmission path is a geodesic according to the extensive Famat's principle.
PPS为非感应式，用聚丙烯电介质和镀金属聚丙烯薄膜串联以铝箔为电极绕制而成，导线采用镀锡铜包线，采用环氧树脂包封。
PPS are non-inductively wound with polypropylene, dielectric and metallized polypropylene film in series with aluminum foil for electrodes using copper-clad steel leads anf epoxy resin coating.
PPS为非感应式，用聚丙烯电介质和镀金属聚丙烯薄膜串联以铝箔为电极绕制而成，导线采用镀锡铜包线，采用环氧树脂包封。
PPS are non-inductively wound with polypropylene, dielectric and metallized polypropylene film in series with aluminum foil for electrodes using copper-clad steel leads anf epoxy resin coating.
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