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单词
mean proportional
释义
WordReference Random House Unabridged Dictionary of American English © 2024
mean
′
propor
′
tional,
[
Math.
]
Mathematics
(between two numbers
a
and
b
) a number
x
for which
a/x
=
x/b
:
The number 3 is a mean proportional between 1 and 9.
1565–75
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更新时间:2024/9/21 14:33:16