Rigidity theory is one ever-flourishing subject in geometry of submanifolds, which can be traced back to Gauss' Theorema Egregium in the classical theoryofsurfaces.
刚性理论是子流形几何中久盛不衰的重要方向，其根源可追溯到经典曲面论的高斯绝妙定理。
2
And what that means, within string theory, is that we may be living on one of those gigantic surfaces, and there can be other surfaces floating out there in space.
根据弦理论，我们只是居住在很多这样的巨型平面中的一个上面，其他地方可能还漂浮着别的薄膜。
3
Furthermore, the present positioning scheme on the basis of screw theory only ADAPTS to simple surfaces.