adding potassium way的用法和样例：
- A kind of non-cyanide alkaline copper plating bath was prepared with copper citrate as main salt and by adding potassium hydrate and suitable brightener into the bath.
- The titer is respectively enhanced by about 14% and 10% after adding potassium and cobalt.Cuprum is an inhibitor when added into erythromycin fermentation medium.
- A few jokes will add a final fillip to your speech.
- She uses tongs to add coals to the fire.