但是这种结合了不对称、解剖学和偶然性的进化机制并不能提供一个充分的解释来说明为什么右利手应该成为优势。

But this evolutionary mechanism combining dissymmetry, anatomy, and chance does not provide an adequate explanation of why right-handedness should have become predominant.

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人(背景，右)与禽(背景，左)流感病毒结合会导致更为严重的症状。

Human (background, right) and bird (background, left) flu viruses combine to make worse symptoms.

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操作符的结合性定义了相同优先级操作符组合的顺序(从右至左或从左至右)。

The associativity of an operator defines the order in which operators of the same precedence are grouped (right-to-left or left-to-right).

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