今天在wiki用机翻啃生肉并且尝试翻译一段个人记录，但是专有名词太多，个人水平又是否有限，作为一个刚入坑的新手很多不了解的地方，跪求翻译廷支援~我先贴一下原文，然后说一下一些不理解的地方。
Semnai - Brother Semnai was serving his second vigil of the Long Watch（second vigil of the Long Watch是否是指守望生涯的第二次行动？如何理解second vigil？） at the time of a notable operation, his first spent as a Kill-marine in the Koronus Expanse. The exact nature of Brother Semnai's service in that far distant region of the galaxy remains a mystery, and it appears he travelled on the bridges of as many as a dozen different Rogue Trader vessels. Many suspect Brother Semnai had been tasked with hunting down a specific enemy of the Deathwatch in the Koronus Expanse, and that he finally cornered that unknown foe on the very brink of the Hecaton Rifts（Hecaton Rifts是什么意思？）.
Other than the fact that Brother Semnai discharged his Apocryphon Oath during that final battle, all that is known is that he sought to return to his Chapter's homeworld, his vessel laying up at Watch Fortress Erioch during its long voyage.
上文中discharged his Apocryphon Oath during是否是殉职的意思？return to his Chapter's homeworld这里有疑问，这篇文章讲的Semnai来自恸哭者战团，恸哭者战团是没有母星的，这里的homeworld是否指的是战团本身？
这一段的意思是否是说他在一次行动中殉职，虽然他一直希望可以叶落归根但是他的棺木还是一直放在守望要塞里？
Needless to say, Brother Semnai never completed the journey, deciding instead to stand a second vigil after Inquisitor Ramaeus approached him and specifically requested his aid in some undisclosed task. Brother Semnai served during the Hadex Anomaly operation and the reason for his continued interment in the Erioch Reclusiam is a complete mystery.
最后一段的意思是否是审判庭派Semnai去执行一项秘密任务但是他没有成功，但是他参加Hadex Anomaly和他能埋葬在Reclusiam的原因不明。
Semnai是否是一个科技星际战士？因为我在查Apocryphon Oath的时候在Techmarine的词条里面发现这个词。