经济学人下载:量子计算机蕴藏的商机(1)

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For one thing, he didn't trust his legs to hold him up.

首先，他不相信自己的腿能站起来。 

2.all but 几乎就

Without you the job would have been all but impossible.

如果没有你，这项工作几乎就是不可能完成的。 

3.speed up 加快

I had already taken steps to speed up a solution to the problem.

我已经采取措施加快解决这个问题。 

4.a boon to ……的福音

It is for this reason that television proves such a boon to so many people.

正是这个原因电视机才成了这么多人的一大福音。