The loop simply iterates through the array and prints each line as it would do on the command line, but enforcing an XHTML break-line element after each print.
此循环迭代这个数组并打印每一行，与它在命令行上所做的无异，只不过在每次打印后均强制使用一个xhtml断行元素。
Since this command expects an array, the original hash is unwound into an array in such a way that the values follow their respective keys in the array.
由于这个命令需要以一个数组作为参数，所以将原来的哈希表拆解为一个数组，拆解的方式是，在数组中，每个值跟在它的键的后面。
On a machine where ps is not a valid command, this should return an empty array.
在 ps 不是有效命令的机器上，这应该返回空数组。
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