The closed system allows energy to transfer through the boundary but not mass.

闭系允许能量通过它的边界传递,但质量不行。

麻省理工公开课 - 热力学与动力学课程节选

Well at some level it is an ordered sequence of characters. Right? Now it is not represented this same way. You don't see strings inside these open parens and closed parens.

现在字符串不是用这种方式表达的,你没有看到字符串里有开括号闭括号,字符串中间也没有逗号,但是它有同样的属性。

麻省理工公开课 - 计算机科学及编程导论课程节选

My friends in Britain, and of courese, Britain is our oldest, one of, it's not our oldest ally but it's certainly one of our closed allies.

我在英国的朋友，当然，英国是我们最早，不，它不是我们最早的同盟国,但它是我们最紧密的同盟。

普林斯顿公开课 - 国际座谈会课程节选

Let's see if it recognizes, try voting--polling closed--not so good.

我们试试它能不能识别,投票,结束,不太好

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选