There is no protection for the DNA in a bacterium -- the wadded-up ball floats in the cytoplasm roughly in the center of the cell.是什么意思_There is no protection for the DNA in a bacterium -- the wadded-up ball floats in the cytoplasm roughly in the center of the cell.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句