Large space structures are infinite-dimensional distributed-parameter systems, which theoretically have infinite numberofvibration modes.
大型空间柔性结构是无穷维的分布式参数系统，理论上具有无穷多个振动模态。
2
This could not be otherwise; and from the slowness of a vibration, or from the small numberof vibrations in a day, Cavendish computed the real weight of the earth.
就是用这样的办法，通过观察这缓慢的振动和计算一天中的振动次数，卡文迪什计算出了地球的确切的重量。
3
A piezoceramic vibrator has infinite numberofvibration modes, but usually only one or a few of them are used and all the other undesirable modes must be suppressed.