Are there any questions or comments?
有没有什么问题或意见？
Are there any questions you'd like to ask?
大家有什么问题想问吗？
Does anyone have any questions or comments?
有人有什么问题或意见吗？
Now we have about ten minutes for questions and answers.
现在我们有大约10分钟的问答时间。
Now I'd like to invite your questions and comments.
现在我想请大家提问或者发表意见。
I would be happy to answer any questions.
我很乐意冋答任何问题。