在所有复合指派运算子上，多载二元运算子即隐含多载对等的复合指派。
On all compound assignment operators, overloading the binary operator implicitly overloads the equivalent compound assignment.
若超赋值可以指派真值，则可以进一步研究各复合命题的真值情况。
If super-value can disclose truth, then further study of the truth of various complex propositions is possible.
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