常见例句Objective:To study the feasibility of detecting free-fetal DNA in maternal plasma by multiplex short tadem repeat(STR) loci amplification. 目的：探索短串連重複序列（STR）多位點檢測孕婦血漿中胎兒遊離DNA的可行性。tadem system [計] 串聯系統 返回 tadem