1·As an example, Listing 2 can leverage the existence or non-existence of positional parameters to provide a helpful usage message if you specify no arguments.
例如，如果您未指定任何参数，则清单2可以利用位置参数的存在性或非存在性来提供有帮助的用法信息。
2·Arguments against positional goods are no arguments against enhancements as such.
反对位置商品的争论中没有反对这类增强的。
3·As you've already seen, traversal and direct access require positional knowledge of the articles.
正如已经看到的，遍历存取和直接存取都需要知道图书的位置。
4·Without the two positional operators, user names of arbitrary length would erroneously be accepted.
如果没有两个位置操作符，则会错误地接受任意长度的用户名。
5·You can also create functions and methods with keyword-based arguments — a nice break from the standard positional arguments you see in PHP.
您还可以创建使用关键字作为参数的函数和方法 — 这与 PHP 中的标准位置参数迥然不同。
1·The point about positional goods—and of fashion and brands in general—is their relative attractiveness.
有关地位商品以及一般性的时尚和品牌的价值是它们的相对吸引力。
2·These "positional goods", as they are called, are in fixed supply: you can enjoy them only if others do not.
所谓的“地位性商品”都是限量供应的，在别人得不到的情况下才是一种享受。
3·Once they have filled their bellies and put a roof over their heads, people want more of what Fred Hirsch, an economist who worked on this newspaper in the 1950s and 1960s, called “positional goods”.
一旦食可果腹，居有定所，人们就想要更高层次的东西。 这就是19世纪五六十年代在该报工作的经济学家Fred Hirsch所谓的“地位商品”。
4·Expensive pictures are primarily what economists call positional goods-things that are valuable largely because other people can't have them.
名贵的画作被经济学家称为地位性商品——这类商品昂贵的价值很大程度是因为其他人无法拥有。
5·Ossified societies guard positional goods more, not less, jealously.
僵化的社会更加嫉妒和警惕着象征地位的商品。