acid and alkali-modification的用法和样例：
- The acid and alkali are combined into salt.
- The acid and alkali are combined in salt.
- Acid and alkali are the basic concept of chemistry.
- Soluble in water, acid and alkali solution, slightly soluble in ethanol.
- It was concluded that both acid and alkali can promote the gelatinization,w...
- The results indicate the mortar is highly resistant to acid and alkali medium.