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Heaviside | 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
Heaviside
: 25 phrases in 13 subjects
Air defense1
Artificial intelligence1
Astronomy1
Chemistry2
Electronics2
Energy industry2
Ichthyology1
Mathematics2
Oil / petroleum1
Power electronics2
Space4
Technology5
Telecommunications1

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