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System frequency is. held very accurately except during infrequent time when abnormal situations exis...

除了偶尔出现异常情况外，电力系统的频率可以保持非常准确。

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Pollination insects limit the evolutionary mode of the entomophilous flower. An internal connection exis…

植物的花部特征与传粉者行为、传粉机制和植物适合度间有丰内在的联系。

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Then the simplified model for the LPFG is deduced with ignoring longitudinal coupling of modes and coupling of cladding modes themselves, and also assuming the modulation of refractive index exis...

忽略轴向的模式耦合以及包层模式之间的相互耦合作用，并认为折射率指数的调制只存在于纤芯中，建立了简化的长周期光纤光栅数学模型。

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Then the simplified model for the LPFG is deduced with ignoring longitudinal coupling of modes and coupling of cladding modes themselves, and also assuming the modulation of refractive index exis...

忽略轴向的模式耦合以及包层模式之间的相互耦合作用，并认为折射率指数的调制只存在于纤芯中，建立了简化的长周期光纤光栅数学模型。

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