He worked hard. In time,he earned enough money to take control of an iron factory.

VOA: special.2010.02.25

These in turn control the hard drive's moving parts.

这些反过来控制硬盘的移动部分。

哈佛公开课 - 计算机科学课程节选

We respnded aggressively, very aggressively on a lot of different occasions, and it was the kind of crisis that is just hard to keep control of. Ultimately we did.

我们的应对措施很强势，非常强势,在很多情况下都是如此，这次危机是,很难控制的，但最终我们做到了。

普林斯顿公开课 - 国际座谈会课程节选

Yet he struck hard and fast, and soon had control of the valley's main towns.

VOA: special.2009.09.17

That means he had a hard time realizing when it was out of control.

VOA: special.2009.07.28

"They have gone through the past month or so of very hard effort to reach the point where they can begin to consolidate and control ground that they have won so, by no means this is over yet.

VOA: standard.2009.07.27