program control flow

例句：

1. 1. Theprogram was designed to improve efficiency.
   这个程序旨在提高效率。
2. 2. The team worked tirelessly tocomplete the program on time.
   团队努力不懈地按时完成了项目。
3. 3. The program has beenwell-received by the public.
   该项目受到了公众的广泛欢迎。