您要查找的是不是：
- COD特征值 characteristic value of COD
- 特征值 eigenvalue
- COD chemical oxygen demand (COD)
- ｒ重特征值 r-fold eigenvalue
- COD值 COD
- ＣＯＤ特征值 characteristic value of COD
- 高COD high COD
- 径流特征值 characteristics of runoff
- 低COD low COD
- 水库特征值 reservoir characteristic parameter
- COD/P COD/P
- CODα CODα
- 变体特征值 variant tag value
- 临界COD critical COD
- 零特征值 zero eigenvalue
- COD测定 COD determination
- 边值问题特征值 eigenvalue of boundary value problem
- COD展开 COD expansion
- 年特征值 annual eigenvalue
- COD去除 COD removal
