低质量的句子示例
大多数肿瘤标志物是由正常细胞和癌细胞产生的，然而，它们在癌细胞中的含量更高。
Most tumor markers are made by normal cells and cancer cells but are produced at much higher levels by cancer cells.大多数肿瘤标志物是由正常细胞和癌细胞产生的，然而，它们在癌细胞中的含量更高。
Most tumor markers are made by both normal cells and cancer cells, but they are made in higher amounts by cancer cells.大多数肿瘤标志物是由正常细胞和癌细胞产生的，然而，它们在癌细胞中的含量更高。
Most tumor markers are made by normal cells as well as cancer cells; however, they are produced at much higher levels in cancerous conditions.
