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arithmetic progression
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archit.
算术
等差
级数
math.
等差级数
;
算术级数
;
算术累进
;
★
又称
算术数列
scient.
算术〔等差〕级数
tech.
★
等差数列
telecom.
算术【等差】级数
arithmetic progression
:
4 phrases
in 3 subjects
Agriculture
1
Cryptography
1
Scientific
2
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