2. The model filename should be singular of the corresponding database table name. 模型的文件名应该是对应数据库里表名的单数形式。
3. Using the singular value decomposition of matrix, the authors give several results on the extremum for matrix quadratic form, which corrects and generalizes some results in [1]. 本文利用矩阵的奇异值分解，给出矩阵二次型极值的若干结果，这些结果修正并推广了文献[1]中的一些结论。
英英解释
n.
1. the form of a word that is used to denote a singleton
2. unusual or striking
3. beyond or deviating from the usual or expected
4. being a single and separate person or thing
5. composed of one member, set, or kind
6. grammatical number category referring to a single item or unit
7. the single one of its kind
