symmetric key对称密钥symmetricadj.对称的；匀称的symmetric autooscillations对称自振symmetric partial ordering[计] 对称半定序, 对称部分定序symmetric reflexive matrix对称自反矩阵symmetric primitive matrix对称本原矩阵symmetric Dulling equation对称Duffing方程symmetric turbulent mixing对称湍流搅和symmetric banded structure对称带状构造symmetric cooperative game对称合作对策symmetric frequency sample偶对称频率采样symmetric covariant tensor对称共变张量

1. The rather messy expression in the brackets can be written in a symmetric form.
   中括号中这个相当凌乱的表达式可以写成对称形式。
2. Here he inaugurated the spectral theory of bilinear symmetric forms.
   在这里他开创了双线性对称形式的光谱理论。