PROFESSOR: All right, I'm hearing a little of both, but I'm very encouraged to hear quite a few people saying sigma.

好，我听到了两种答案，但我很高兴听到不少人说sigma键。

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But I'm happy to answer any questions about genetically modified foods,

但我很高兴能够回答任何关于转基因食品的问题，

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So it would have been nice to have this at a later hour but this was the only time that really worked into the schedule, so I appreciate you being here.

所以,如果能晚一点上课当然好,但这是课程表唯一能排出来的时间,所以我很高兴你们能来上课

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But you're really enjoying yourself and I'm glad.

但你玩得很开心，所以我也很高兴。

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