English Reader

To prove it 验证

Someone asked a little boy: "Is a pound of lead heavier than a pound of feathers?" The boy quickly replied: "Of course it is."
When he was told "You are wrong. They both weigh the same," he insisted that a pound of lead is the heavier. He said: "To prove it, I would go up on the balcony and drop a pound of feathers on your head and then drop a pound of lead to let you say which is the heavier."