句子是这样的,In this model, the sense-strand piRNA precursor transcripts are exported to the nuage, where they are cleaved by Aub-antisense piRNA complexes, silencing target gene expression and generating precursors of sense-strand piRNAs. 还有这一句也包含:Mature Aub complexes then remain in the nuage and function in piRNA production and sense-strand transcript destruction,whereas mature Piwi complexes are imported into the nucleus and mediate heterochromatin assembly and transcriptional silencing, or co-transcriptional RNA destruction。