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ordinal utility
 ordinal utility abbr.
econ. 序列效用
 | function
 function abbr.
gen. 运行; 工作
hydroel.st. 作用
interntl.trade. 效用; 职能
light. 功能，用途
math. 运算
met. 功用; 用途

to phrases

ordinal utility

econ. 序列效用
tech. 序数效用
ordinal utility
: 6 phrases in 3 subjects
Economics3
Mathematics1
Technology2

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