acid declining phase的用法和样例：
- "The evolution of the epidemic is now in its declining phase," said Jose Angel Cordova, the health minister.
- The works of Li sao expanded the artistic creation of Elegies of Chu from quantity and led Elegies of Chu to the declined phase.
- Overexploitation cycle exists in the general decline phase, when the growth rate has exceeded supply demand rising vacancy rate, prices fell trend.
- During the process of fruits ripening,the contents of citric acid and malic acid declined gradually but the contents of oxalic acid,ascorbic acid and lactic acid increased.