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....
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....
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...