科研之友
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摘要
<正>细胞是生物体基本的结构和功能单位构和功能单位。已知除病毒之外的所有生物均由细胞组成成,但病毒生命活动也必须在细胞中才能体现细胞中才能体现。The cell is the basic unit of life. Some organisms are made up of a single cell, like bacte-ria, while others are made up of trillions of cells. Human beings are made up of cells, too.
