clear band meaning in English

干净区
空白区
清除区
清洁区

300 clear bands including 289 polymorphic bands and 50 specific bands were amplified from the genomic dna of gastrodia elata bl . by these selected primers . the rate of polymorphic bands and the rate of specific bands were 98 . 0 % and 16 . 6 % respectively
6个引物组合共扩增出300条清晰可辨的条带，其中289条多态性条带， 50条特异性条带；多态性条带率和特异性条带率分别达98