- The bromine liquid and IR spectrum were used for quality analysis, and the results proved that products were aloin A and aloe emodin.
- Aloin A and aloe emodin were separated by vacuum distillation and purification, and designed orthogonal experiment to find out the best experimental conditions.
- There is a vein of melancholy in his character.
- There was a long lag in forwarding mail to us.
- A bowl of hot chicken soup is good for you.
- A cloud is a mass of vapor in the sky.