The technical definition of variance is the random variable's second central moment, the weighted average of the square of the differences from the expected value.

3方差的专业定义是随机变量的二次中心矩，与期望值之差的平方的加权平均值。

youdao

This paper, firstly, starts with the definition of central bank independence with respect to personnel, financial and policy independence, and points out this definition is in relative terms.

首先，本文从中央银行独立性的定义入手，分别从人事、财务和政策三个方面界定独立性，并指出独立性的相对性。

youdao

The definition of plane central curve with positive integer degree was proposed.

给出了平面正整数次中心曲线的定义和中心命题。

youdao

The cottages are equipped with phones, high-definition TV, central heating and double-paned windows to keep out raging storms.

FORBES: Bed & Beacon

And, as a matter of definition, when central banks expand their respective balance sheets they create liquid assets for commercial banks.

BBC: Banks agree minimum liquidity rules

The chips will include an 800-megahertz ARM central processor--the same power-sipping design powering many smart phones--with a high-definition video processor, an imaging processor, an audio processor and a tiny, low-power version of the GeForce graphics processors Nvidia pushes for desktop and laptop computers.

FORBES: Magazine Article