propagation

propagation

[ˌprɒpə'ɡeɪʃn]

n.传播，传输，蔓延，扩展，波及深度;〔生〕繁殖法，〔地〕传导;宣传;培养;

复数： propagations

例句:

1、

We first take up the subject of optic ray propagation through a variety of optical media.

首先研究光束通过各种光学介质的传播问题.

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2、

Propagation of virus in embryonating eggs was first used by Goodpasture and Woodruff in 1931.

1931年Goodpasture和Woodruff首次应用鸡胚培养病毒.

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3、

Also, the idea of progress and its enthusiastic propagation may have some effect.

还有, 进步观念及其热烈宣传也会产生某种效果.

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