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单词
sign of aggregation
释义
WordReference Random House Unabridged Dictionary of American English © 2024
sign
′
of aggrega
′
tion,
[
Math.
]
any of the signs used to indicate grouping in an algebraic expression: vinculum, bar, or raised horizontal line,
a+b
; a pair of parentheses, (
a
+
b
); a pair of brackets,[
a
+
b
]; or a pair of braces, {
a
+
b
}.
1940–45
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更新时间:2025/7/31 12:25:49