那么，在地板上放五秒钟这个时间，是将可食用食物与食物中毒区分开来的临界阈值吗？

So is five seconds on the floor the critical threshold that separates a piece of eatable food from a case of food poisoning?

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她帮我给地板上蜡时，我们闲聊了很长时间。

We'd have long talks while she helped me wax the floor.

《柯林斯英汉双解大词典》

真是浪费时间！令我吃惊的是，我们的宠物狗奥利走到地板上的脏乱处。

It was such a waste! To my surprise, Ollie, our pet dog, walked over to the mess on the floor.

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