When not removed, plaque causes tooth decay and gum disease.牙斑如果不清除就会导致牙齿蛀蚀和牙龈疾病。There are problems of urban decay and gang violence.存在城市衰败和帮派暴力的问题。The phosphate was deposited by the decay of marine microorganisms.海洋微生物腐...
本发明提供一种用来将一输入信号降频为一输出信号的混频器.The invention provides a mixer which an input signal into an output signal through frequency reduction.直接降频转换接收器架构能够以较低成本提高无线系统基站接收器的性能.Framework of direct - down conversion receiver can provi...
在那里,对我来说一切变得很不顺利。Everything turned sour for me there.双梯形的试样将产生切变脱胶现象.A double trapezoidal specimen will generate shear debonding.米勒·普罗森还有基奥都对提高层间切变强度作了大胆的尝试.Ambitious attempts to improve interlaminar shear strength have ...