It is true that we do not know what we have until we lose it, but it is also true that we do not know what we have been missing until it arrives.

诚然，我们并不知道我们失去了什么，直到我们真的失去了它们；但是我们也确实不知道我们已经漏掉了什么，直到漏失的东西又回到了我们身边。

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We do not know what they eat or why they also live with a wax scale insect.

我们不知道丝蚁吃什么，也不知道为什么和白蜡虫生活在一起。

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We also know there are known unknowns; that is to say we know there are some things we do not know.

我们也知道还有一些已知的未知，也就是说我们知道自己还有一些不知道的事情。

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" The Estimate also states: "We do not know the status of this arrangement.

CNN: Text of CIA Director George Tenet's statement

But we also know that such a strategy is not necessarily going to do down well with the rest of the world at a time when many other countries are dealing with the same problem.

BBC: New Year messages from Japan

An FTT would crimp economic growth and thus would reduce total tax revenue, not increase it and finally, we do indeed have several FTTs currently and also know that they crimp economic growth and thus reduce total tax revenue.

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