to have a facelift接受去皱整容手术Nothing gives a room a faster facelift than a coat of paint.重新粉刷一下是使房子焕然一新的最快方法。Radiofrequency is a procedure that offers an alternative to the traditional facelift.射频技术则是替代传统面部整形的一种方法....
这里你应该用复数代词.Here you should use plural pronoun.这里有关于用复数来讲二维力学的简短讨论.There is a brief discussion of two dimensional mechanics in terms of complex numbers.用复数算术推导了正弦,余弦的加法公式.We derive the addition formulas for sine and cosin...