例句與造句

1. according to the relation between tangent space and annihilation space of parameterization singularity manifolds, we present the new concepts of first order and second order singularity . degenerate and non-degenerate parameterization singularities are analyzed and the sufficient and necessary conditions for degenerate singularity are derived
   研究了退化和非退化奇異位形的特點(diǎn)，給出了判斷退化參數(shù)化奇異位形的充分和必要條件，其中對(duì)必要條件，提出了一種方便實(shí)用的morse判斷函數(shù)。
2. It's difficult to find second order singularity in a sentence. 用second order singularity造句挺難的