It "wraps" multiple expressions, evaluates them from left to right, and the value of the whole expression is determined by the last sub-expression.
“包装”多个表达式，评估它们从左到右，整个表达式的值取决于最后的子表达式。
It "wraps" multiple expressions, evaluates them from left to right, and the value of the whole expression is determined by the last sub-expression.
“包装”多个表达式，评估它们从左到右，整个表达式的值取决于最后的子表达式。
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