9月到了,早晨已有了寒意.September is here, bringing with it a chill in the mornings.初春季节仍有寒意.It's spring but there's still a chill in the air.今天早晨的空气颇有寒意.There is quite a chill in the air this morning....
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...
The design theory of driver circuit of large power circulator is discussed.本文论述了大功率环行器驱动电路的设计理论.Massage the aged regularly for better blood circulator.须帮老人轻巧地按摩身体,使老人血液循环畅通....