常見例句Objective:To study the feasibility of detecting free-fetal DNA in maternal plasma by multiplex short tadem repeat(STR) loci amplification. 目的：探索短串連重復(fù)序列（STR）多位點(diǎn)檢測孕婦血漿中胎兒游離DNA的可行性。tadem system [計(jì)] 串聯(lián)系統(tǒng) 返回 tadem