翻译:殆平坦流形 同义词1)almost flat manifold,殆平坦流形2)almost parallelizable manifold,殆可平行流形3)almost product manifold,殆积流形4)flat submanifold,平坦子流形5)almost contact manifold,殆切触流形6)compact almost complex manifold,紧殆复流形