Wagon trains -- groups of wagons -- rode in four lines across the land when they passed through dangerous country.

VOA: special.2009.03.30

In the next line four lines, we have Camus; the god of the river Cam appears.

下面四行，开姆斯;,开姆河河神出现了。

耶鲁公开课 - 弥尔顿课程节选

So, initially they came up with four lines and then eventually five and even six, and then they went back to five by the fifteenth century.

那么,他们最初提出的是四条线,但是最终却是五条线,甚至六条线,然后在十五世纪又回到了五条线

耶鲁公开课 - 聆听音乐课程节选

Lee sent Stonewall Jackson, with twenty-four thousand men, on a quick march around the western end of Pope's lines.

VOA: special.2009.09.24

Because as you'll soon find, when you're writing programs 0 that aren't just four lines long but are 40 or 400 which very quickly becomes easy, you'll find that even you the next morning have no idea what this code does for whatever reason, and just having some English comments is a huge boon to comprehension for yourself and others.

你们自己写程序时就会发现,用40行甚至400行代码来代替繁杂拥挤的4行代码0,将会让事情简化许多，你会发现，即使由于某些原因,你不知道如何写代码，先写些注释，于人于己，都是好事,易于理解嘛。

哈佛公开课 - 计算机科学课程节选

But these slow-wilting lines, he says,produce four to eight bushels more than normal soybeans under drought conditions.

VOA: special.2009.03.23

Lines seventy-six to eighty-four.

看第76到84行。

耶鲁公开课 - 弥尔顿课程节选

A major earthquake in nineteen ninety-four was centered along one of these smaller fault lines.

VOA: special.2010.01.12

So in other words, if you terminate these lines early, if you terminate the four loop early, if you terminate an if condition early with that semicolon, the code may very well work; and this is a common source -- of frustration and conundrum because you don't -- because your code looks right and yet it's misbehaving, but that semicolon means stop looking for subsequent lines of related code.

换句话说，如果你用分号过早的终止了这些代码行，如果你过早地终止了那个for循环，如果如此,一个if条件，代码可能可以运行，这就是,挫折和问题产生的源头，因为你没有-,因为你的代码看起来是正确的，但是运行是错误的，那个分号的意思是,停止寻找后面相关的代码。

哈佛公开课 - 计算机科学课程节选

Engineers decided that four new rail lines would be possible.

VOA: special.2009.04.23