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Terms
containing
unknown number
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all forms
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exact matches only
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in specified order only
Subject
English
Chinese
avia.
number of unknown
未知数
gen.
the sign x denotes an
unknown number
符号x表示一个未知数
hydroel.st.
unknown number
未知数
avia.
unknown number
of target
未知目标数
tech.
unknown prime number
未知素数
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