... conservation of angular momentum角动量守恒 conversation of charge电荷守恒 conservation of energy能量守恒 ...
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conservation of charge
The research could lead to panels that can charge a cell phone from a conversation or provide a boost of energy to the nation's electrical grid generated by the noise during rush hour traffic.
这项研究可能有助于发明出一种面板，这种面板可以使手机能够靠通话的声音来充电，或者通过上下班高峰期的交通所造成的噪音为国家电力网络提供电能。
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