acidity and alkalinity的用法和样例：
- Contain Vitamin A and mineral elements to promote skin renewal, help to balance skin acidity and alkalinity, and endow skin with health and vigor.
- In the thesis, the effects the acidity and alkalinity of electrolyte on degrees of starch oxidation were discussed and theoretically expound the reasons.
- The diatomite-modified-asphalt possesses strong stickiness after being mixed with stone stock of neutrality, acidity and alkalinity, and can be applied in the constructions of highway.
- The method hybridized can effect not only the bond length between two atoms and the acidity and alkalinity of its corresponding molecule but also the strong and weak of bonds in a molecule.
- There are a series of ecological factors including temperature, water, oxygen, light, soil acidity and alkalinity, soil salinity, chemicals, sowing depth, and biology which affecting seed germination.
- According to the great influence of system acidity and alkalinity on MCM41 molecular sieve formation in hydrothermal condition, a detailed formation mechanism of MCM41 was proposed.