alternate key

基本解释

For example testing alternate designs for key pages to see which performs better.
例如通过测试几个可选的关键页面设计，可以很明确的看到哪个设计表现更好。
The retrieval of a data record in an indexed file by the primary (or optionally, alternate) key within the data record .
在索引文件中，通过数据记录中的主要关键字或可选关键字进行数据记录的检索的一种方法。
A container can either support strings as its keys, like the root object itself, or can use integers as an alternate key system instead.
容器可以支持将字符串作为其键值，就像根对象本身一样，或者可以使用整数作为备选键值系统。

Last week, I penned a long op-ed offering an alternate plan that first establishes key solo franchises to help generate far more buzz and anticipation for a Justice League movie, as well as helping to give audience a far more thorough introduction to the characters and help make the superheroes more relatable to mainstream non-comics-reading viewers.
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Other key issues for the Illinois senator include a revamped energy policy focusing on increased efficiency and alternate technologies, and expanded health care coverage for all Americans.
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It will be of interest to readers that Wave C was exactly equal to Wave A. Once again, this fits in with the Elliott Wave theory that says alternate waves in a correction tend to be related by a Fibonacci ratio, and 100% is a key number.
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