Coagulation and stretch are two crucial working procedures during precursor fabrication, which play important roles in precursorstructure and performance.
凝固成形和拉伸是原丝生产过程中两个十分关键的工序，它们对聚丙烯腈原丝的结构和性能有着重要的影响。
2
The results agree with previous studies that have analyzed single photons whose precursor and main wave form have not been separated, which have reported an oscillatory structure.
结论与先前的研究相同，虽然先前的研究分析的是尚未将前驱和主波分离的光子，它们显示出了一个振荡结构。
3
The interference of the precursor and the slightly delayed main waveform can explain this structure.