The astronauts survived by rationing water and food while using the lunar lander as a lifeboat before returning to the command module for re-entry to Earth.

VOA: standard.2010.04.04

At the end of the day, you can implement the exact same program using a while loop that you can using a for loop, it's just your code is going to look slightly different.

最终，你可以执行这个程序,再使用for循环的地方使用while循环，这只是使你的代码看起来稍微有点不同。

哈佛公开课 - 计算机科学课程节选

And you'll find in the end that recursion is a feature of a language, it allows you to map some very obvious concepts like the phonebook tearing in half and half and half and half to actual code without it using some arbitrary human contrived framework like a for loop or a while loop which are much more stilted mechanisms.

最后你会发现递归是某种语言的一种特征,你可以用它将一些非常明显的思想,比如将电话簿划分为一半又一半,映射为实际代码，而不必使用那些人为框架,像for循环，while循环之类的,那是很呆板的机制。

哈佛公开课 - 计算机科学课程节选

She made each hand as an example to students while she was teaching a class on drawing using free-motion embroidery.

VOA: special.2009.11.04

He says he learned about using lambs while visiting wineries in New Zealand.

VOA: special.2009.07.14

Mister Fosko suggests darkening windows or using sunscreen and protective clothing while driving.

VOA: special.2010.07.06

Before spring training, Rodriguez admitted to using steroids while he played with the Texas Rangers in 2001-2003.

VOA: standard.2009.12.24

Mr.Ahmadinejad's assault against opposition leaders comes at a time when he is being criticized by his own supporters for using poor judgment in trying to form a new government, and while Supreme Leader Ayatollah Ali Khamenei has softened criticism of the opposition.

VOA: standard.2009.08.28