下一个块应该是非常熟悉的：它在未提供参数时打印用法信息。
The next block should look familiar: It prints a usage message if no arguments are provided.
如前所述，匿名块的最常见用法就是调用过程语言对象，通常是为了进行测试。
As mentioned, one of the most common USES of anonymous blocks is to invoke procedural language objects, typically for testing purposes.
Ajax的一个常用用法是装载HTML块到页面的一个区域内。
A common use of Ajax is to load a chunk of HTML into an area of the page.
语块广泛存在于语言中，并有着丰富的用法和功能，因此对第二语言习得和语言教学有重要意义。
FS (Formulaic Sequences) are widespread in language and have a variety of usages and functions, and therefore play an important role in second language acquisition and language teaching.
语块广泛存在于语言中，并有着丰富的用法和功能，因此对第二语言习得和语言教学有重要意义。
FS (Formulaic Sequences) are widespread in language and have a variety of usages and functions, and therefore play an important role in second language acquisition and language teaching.
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