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来源：雅诚德英语网
When you drop a piece of food on the floor, is it really OK to eat if you pick it up within five seconds?
当你把一块食物掉到了地上时，如果你在五秒内捡起了它，那真的可以吃吗？
When you drop a piece of food on the floor, is it really OK to eat if you pick it up within five seconds?
当你把一块食物掉到了地上时，如果你在五秒内捡起了它，那真的可以吃吗？