By importing food from all over the world, certain products can be transported so far that they generate their own weight in CO2 during their journey.

在引进世界各地食品的过程中，某些产品运输途中产生的二氧化碳和他们自身的重量相当。

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First of all, not all checked exceptions are bad; they might be used for event notification or to redirect processing based on certain conditions.

首先，不是所有受控异常都是不好的；它们可用于事件通知或根据某些条件重定向处理。

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If sanctions were used only when their consequences were certain, then they would never be used at all; and uncertainty is no excuse for doing nothing, because that could be just as dangerous.

如果只在后果明确的情况下实施制裁，那么就不会有制裁发生了；不确定不是无所作为的借口，因为无所作为同样危险。

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Do sons and daughters take turns doing certain chores so they both learn to be proficient in all household activities?

CNN: Why men should share equally in housework

So, given that Facebook can find people to replace Spotify, if they should so wish, but Spotify cannot find anyone to replace Facebook, even should they wish to, we can be fairly certain that all the money, in the end, is going to flow to Facebook.

FORBES: The Facebook Spotify Deal: Cui Bono?

By contrast, American mobile missiles if they can be deployed at all seem certain to be constrained operationally in ways that will impinge upon (if not eliminate) the benefits that ostensibly attend their mobility.

CENTERFORSECURITYPOLICY: Bush��s Faustian Deal On Mobile Missiles