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The biology class studied the structure of a cell.
生物课讲授细胞的结构。
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Since then, the basic structure of a solar cell has changed little.
自此，太阳能电池的基本构造几乎从未改变。
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Since then, the basic structure of a solar cell has changed little.
自此，太阳能电池的基本构造几乎从未改变。
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