character signal

例句：

1. 1. The character signal of the new product is different from that of the old one.
   新产品的特征信号与旧产品不同。
2. 2. The character signal of the DNA sequence was determined by sequencing the region.
   通过测序该区域确定了DNA序列的特征信号。
3. 3. The character signal in the data set is significant for predicting the future trends.
   数据集中的特征信号对于预测未来趋势是重要的。