They say modern automobile windshields block two kinds of ultraviolet radiation.

VOA: special.2010.07.06

So, here's the syllabus: two big blocks, first block general principles of chemistry, 1 and that's the same whether you take 3.091 or 5.111 or 5.112.

这就是教学大纲，两大块，第一部分是化学的通则，关于这点，我们的课程1,还有，5。111课程以及，5。112课程都是一样的。

麻省理工公开课 - 固态化学导论课程节选

If you go back down Powell, like a block or two,

你到鲍威尔街，离这里一、两个街区的路程，

充满乐趣 - SpeakingMax英语口语达人

In Scratch, the block you may have used for this idea literally says "or" for or; in C, two vertical bars.

在Scratch中，这个你用的程序块,照字面地想法来说“or“表示或者;,在C语言中，是两个竖线。

哈佛公开课 - 计算机科学课程节选

Yeah. So I spent two years in Israel studying in the place called Gush at Etsyon the Etsyon Block which is about 20 km south of Jerusalem.

对，所以说我在以色列待了两年,在Etsyon的Gush学习,在距耶路撒冷以南20公里的Etsyon地区。

普林斯顿公开课 - 人性课程节选