关于掉在地上的几秒钟对于我们的食物安全有何影响这个问题，科学告诉了我们什么呢？

What does science tell us about what a few moments on the floor means for the safety of your food?

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第二，在湖南株洲发生的家乐福事件中，一些外国人觉得安全受到了威胁，你对此有何评论？

My second question is, some foreigners felt their safety under threat in the Carrefour incident happened in Zhuzhou, Hunan Province. How do you comment on this?

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问：日本首相野田佳彦称，中国的军力扩张和海军动向对日本安全构成威胁，你对此有何评论？

Q: Japanese Prime Minister Yoshihiko Noda said that China's military expansion and naval manoeuvre posed a threat to Japan's security. What is your comment?

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