关于简并振动的数目的问题,还需要做进一步的研究.As to the number of degenerate vibrations some further considerations are necessary.在共振时,阻尼可能限制稳定振动的振幅.Damping wakes possible finite steady - state vibration amplitude at resonance.管乐器的声音是由振动的气柱产生...
Leningrad was the third alien city to offer him a surrogate home.列宁格勒是他在异地安家的第三个外国城市。Arms control should not be made into a surrogate for peace.武器控制不应该用来替代和平。Martin had become Howard Cosell's surrogate son.马丁代为当起了霍华...