Then the article analyses the main ingredients: entrepreneurs subrogation frequency, main industrial persistence and industrial diversification which determine the speed of information depreciation.

决定银行私人信息折旧速度的三大因素为：企业家更替频率、主业持续性和经营的多元化。

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The photovoltaic panels generate electricity when exposed to sunlight and are connected to the building's power supply via an inverter synchronised to the electricity main's frequency.

BBC: Solar power for City Works centre in Gloucester

There are two main methods of creating a single-frequency network.

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On channel boosters quickly receive the OTA signal from the main tower and retransmit the signal on the same frequency.

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