Act of purchase and sale的用法和样例：
- We will mail you contract notes of purchase and sale of stocks after every transaction.
- And commendable is adjacent to its new site Sanyuanqiao Phoenix City, within 40 days of purchase and sale, purchase 245 sets, reaching 49% of the total.
- It is pointed out that California's electricity disaster was formed by the market maladjustment of purchase and sale based on the economic imbalance between supply and demand for electric power.
- Liability for breach of a purchase and sale contract.