As an alternative to value comparisons, you can use the self axis (denoted by a dot ". ") to express a "between" predicate.

除了值比较，还可以使用self轴(由点“。”表示)来表达“between”谓词。

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The locator attribute supports the child axis (/), descendant-and-self-axis (//), and attribute axis (@).

locator 属性支持子轴（/）、后代及本身轴（//）和属性轴（@）。

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Results: Comparing with the self control group, the length of axis, cornea diameter and fundus were normal.

结果：实验组与自身对照组比较，眼轴长度、角膜直径、眼底形态均无差异。

youdao

The administration came to town thinking that America's problems with Iran were largely self-inflicted -- a combination of "Axis of Evil" and "regime change" rhetoric, an invasion that gave Iran a reasonable motive for wanting to arm itself with nuclear weapons, and an unwillingness to try to settle differences in face-to-face talks.

WSJ: Obama's Obsolete Iran Policy

Over the past five years the Russians developed a prototype of a vertical axis wind turbine with an innovative airfoil that enables the turbine to self-start.

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