资源参考会建立内部运算式，该运算式会以执行阶段延后为基础提供指定的属性值。

The resource reference creates an internal expression that supplies the value of the specified property on a run-time deferred basis.

youdao

在使用set - x时还要记住一点：如果脚本有内部函数，而且set - x放在代码的主体部分，那么它的输出会包含子函数的运算过程。

One thing to keep in mind when using set -x is that if the script you're evaluating has internal functions, set -x will carry over to its child function if placed in the root body of the code.

youdao

封送处理的布局可能不同于内部布局，因此在使用size of运算符时，我已经描述的类型可能(实际上是非常可能)报告不同的结果。

The marshaled layout could be different from the internal layout, so it's possible (and, in fact, probable) that the types I've described will report different results when using the sizeof operator.

youdao

I can write it explicitly. I can write it inside of a FOR loop. And we've started to add, and we'll see a lot more of this, examples of collections of structures so that we don't just have to do something that can be easily described as walking through a set of things but can actually be a collection that you walk through.

我可以明确的写出来,我可以把它在FOR循环的内部写出来，然后我们开始学习了add这个运算符,我们会在以后学习很多的,集合的数据结构的例子,这样一来我们可以进行一些,很简单的遍历集合的操作,我想要为大家指出的最后一件事情是。

麻省理工公开课 - 计算机科学及编程导论课程节选