I'm most grateful to you for taking so much trouble to explain the best way of getting there.
你不厌其烦地给我解释去那里的最佳途径,我对些深表感激。
A long-lost brother, who was presumed dead, was really alive all the time and wickedly plotting to bring about the hero's downfall.And so on.
主人公一位长期失散的兄弟,大家都以为死了,实际上一直活着,并且正在策划暗算主人公;如此等等,