根据定理4.3的推论, 原点是渐近稳定的.By the corollary to Theorem 4.3, the origin is asymptotically stable.从原点至无穷远处的曲线起分支割痕的作用.Curves running from the origin to infinity may serve as branch cuts.有心力是一种径向力,它的大小只取于离原点的距离.A central force is...
Senator Lugar is skeptical that Congress will appropriate more funding for this purpose.参议员卢格怀疑国会是否会拨出更多资金用于此目的。El lugar a que me refiero no se halla muy lejos de aqu í.这是我昨天对你们说的那本书....