It's just minus the sum of all these things, because of course these are just defined as the work done by the environment to the system.

等于负的这些东西的和，因为它们的定义是,环境对系统所做的功。

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These systems will know us better than our best friends, but will also be connected to the entire Web of Things as well as the collective sum of all human knowledge.

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But what makes Silicon Valley special is the way in which a lot of different things are mixed together to make the sum greater than the parts.

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This is the sum the firm feels it could legitimately claim - in terms of monies spent on things like sponsorship, advertising, research and development - if it was forced to withdraw from cycling.

BBC: Business