A heavy object, like a football player moving at a high speed, has a lot of momentum—that is, once he is moving, it is hard to change his state of motion.

一个重物有很大的动量，也就是说，比如一位高速移动的足球运动员一旦运动起来，就很难改变运动状态。

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'Climate change is a very young science and our view is there are a lot of simplistic solutions being proposed,' he said.

他还说：“环境变化是一个新兴的科学，我们的观点是有许多简单化的解决方案将会被提出。”

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"The costs of a complete switch to renewables are a lot less than the costs to future generations that climate change will cause," he said.

“完全切换为可再生能源的成本将大大少于将来因气候变化所导致的成本”。他说。

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He is working to change a lot of things there - but you know France is what we call 'an old grandmother' - it is difficult to change.

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Mr Fisher said Apple had not forced him into the change and he had "a lot of respect" for the company.

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"When you see my works, it seems they change a lot, " he says, with a thick French accent.

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