The associativity of an operator defines the order in which operators of the same precedence are grouped (right-to-left or left-to-right).
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)。
Remember that you may need to consider associativity of the operators in order to determine the answer in the case of expressions involving more than one operator.
记住，你可能需要考虑操作符的结合性，以便在表达式含有多个操作符的情况下确定答案。
This property of composition is called associativity.
复合的这个性质叫做可结合性。
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