restriction fragment length短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 限制性片段长度 Pvu II and Xba I restriction fragment length polymorphismsRFLP of ER were analysed by polymerase chain reaction- restriction fragment length polymorphism PCR-RFLP . 分析雌激素受体基因多态性与骨密度的关系及各基因型在骨质疏松组与对照组的分布。 fabiao