Nowadays they usually begin, "hey, Professor" or "Yo, Professor," something like this.
如今他们通常以，嘿，教授，或者，呦，教授，这类问候作为邮件开头。
youdao
Why don't you sit back, hey yo, and bob with the tempo.
歌词大意：你为什么不坐回来，嘿哟，和鲍勃与节奏。
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