program expression

例句：

1. 1. The program is designed to improve efficiency.
   这个程序旨在提高效率。
2. 2. The teacher explained the program to the students.
   老师向学生解释了程序。
3. 3. The company has launched a new program to attract more customers.
   公司推出了一个新程序以吸引更多客户。