Many people are upgrading their mobiles to top-end models.很多人不断将手机升级到最高档的款式。Practical application results are perfect after the well done upgrading.改造实施后达到理想的使用效果.The thesis explains investment decision of R & D upgradin...
进入睡眠状态时，我们的脑电波振幅慢慢变大。As we fall asleep the amplitude of brain waves slowly becomes greater.由于驱动机构的作用,使驱动端的振幅保持不变.The amplitude at the driven end is fixed by the driving mechanism.这样,即使是最强声音的位移振幅,也还是非常小的.Thus the displace...