The book leans heavily on tales of knighthood and the quest for the Holy Grail.这本书在很大程度上取材于骑士故事及寻找圣杯的传说。The stories of the Grail are timeless and archetypal.圣杯的故事永不过时，并为后世创作提供原型。Sustained nuclear fusion is the holy grail of the power industry.能持久反应的核聚变是电力工业梦寐以求的“圣杯”。