Zhè / zhǒng / fāng / fǎ / néng / gòu / bǎo / liú / jī / yīn / biǎo / dá / xìn / hào / de / fāng / xiàng / xìng这种方法能够保留基因表达信号的方向性。This method can preserve the directionality of gene expression signals.