在ps不是有效命令的机器上，这应该返回空数组。
On a machine where ps is not a valid command, this should return an empty array.
SOAP接收器遇到了 SOAP信封元素的无效命名空间。
The SOAP receiver encountered an invalid namespace for the SOAP Envelope element.
如果有效命令行（长形式）选项标识符的数量不大，这种方式很合适。
This approach is fine provided the number of valid command line (long form) identifiers is small.
options_description类声明所有的有效命令行选项。
The options_description class declares all valid command-line options.
它将从预定的有效命令行选项列表和时间复杂度为O(1)的查找函数中生成一个散列表。
It generates a hash table from the predetermined list of valid command-line options and a lookup function whose time complexity is o (1).
海瑟目前效命于美国国家足球队(她是防守队员)。
Heather plays in the U. S. National Soccer Team (she is a defender in the case you were wondering).
他们为盟军挖掘战壕，在码头和铁路站干苦力，或是在兵工厂里效命。
They dug trenches, toiled in docks and railway yards or worked in arms factories for the Allies.
他们为盟军挖掘战壕，在码头和铁路站干苦力，或是在兵工厂里效命。
They dug trenches, toiled in docks and railway yards or worked in arms factories for the Allies.
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