1. Cai had to spend hours a day searching databases his journal subscribes to in order to identify plagiarism or copyright infringements.
2. Already there were nearly 2 billion television sets in use and over half the global population subscribes to a mobile telephone service.
3. The plan also sets the maximum subscription amount for each investor who subscribes on the Internet.
4. She subscribes to the philosophy that if you work hard, you play hard.