So what I wanted to do is loop back, at least with a couple of things that we see recurring and very understandably so, but let's try to clear up a couple of frequently occurring issues.

所以我想要做的是回环，至少用两三个,我们看到的东西返回，并且可以理解地，让我们试着处理几个,频繁发生的事情。

哈佛公开课 - 计算机科学课程节选

Let me be clear about several things right up front.

CNN: Text of CIA Director George Tenet's statement

But the devices are so new it is not at all clear how they compare with one another, let alone how they stack up against drugs or surgery.

FORBES: Health

Let me be absolutely clear, because I know you'll end up hearing some of the same claims that rolling back these tax breaks means a massive tax increase on the American people.

CNN: Obama speech to Congress focuses on economy