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How many storage batteries are there on board and how often do they need charging?
船上有多少蓄电池？它们隔多少时间充一次电。
youdao
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The board-shaped solar charging battery is a new product.
状的太阳能可充电电池是新产品。
youdao
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The board-shaped solar charging battery is a new product.
状的太阳能可充电电池是新产品。
youdao