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1.PBEC is a popular online platform for students to learn and collaborate.
PBEC是一个受欢迎的在线平台，供学生学习和合作。
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2.The PBEC team has been working on this project for months.
PBEC团队已经在这个项目中工作了几个月。
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3. PBEC provides a safe and secure environment for students to exchange ideas and knowledge.
PBEC为学生提供了一个安全和安全的环境和想法和知识交换。