我们做这些事情是因为我们知道它们能帮助人们远离救济金，而且帮助那些得到救济金的人更快找到工作。
We're doing these things because we know they help people stay off benefits and help those on benefits get into work faster.
怀疑是有原因的，因为我们并不知道那些药物是真的预防糖尿病，还是只是掩盖它。
There's a reason for skepticism, because we don't know whether these drugs are really preventing diabetes or just masking it.
接下来，因为知道变更是CTA的重要部分，所以我们引入一个图4中的新图表，显示出每次构建中变更的影响，以及那些变更测试得有多好。
Next, because understanding the changes is such a key part of CTA, we introduce a new graph in Figure 4 that shows the impact of changes in each build and how well those changes were tested.
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