preribosomal particle前: front颗粒: pellet; bead; dust; anything ...前核糖体 rna: pre-ribosomal rna前核糖体rna: pre-ribosomal rna; precursor rrna核糖体rna前身,前核糖体rna: pre-ribosomal rna下载手机词典可随时随地查词查翻译