PROFESSOR: Welcome to 5.111, and today what we're going to do is introduce you to the course and the people teaching the course.
教授:欢迎来到5。111。,今天我们将向你,介绍这门课程,和它的教师。
So welcome and we are so glad you are here.
很高兴两位嘉宾的到来。
So welcome! We're glad you're joining us.
欢迎您加入到我们的节目中来。
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