addition of K ratings K的用法和样例：
- CO/O2-TPD showed that the addition of K after Pt could enhance CO weak adsorption and facilitate O2 dissociative adsorption.
- The addition of fruit makes the cereal taste good.
- The reciprocal of K is called the compressibility.
- The communication cost of GMR is independent of k.
- Characterized by the addition of layers of woody tissue.