PART I The Story of Merlin

 HERE followeth a particular account of the enchantment¹ of Merlin by a certain damsel, hight Vivien, and of all the circumstances thereunto appertaining.

Likewise it is to be narrated² how King Arthur was betrayed by his own sister, and of how he would certainly have been slain³ only for the help of that same enchantress Vivien who was the cause of Merlin’s undoing⁴.

Also it shall be told how the sheath of Excalibur was lost at that time.

1 enchantment   

n.迷惑，妖术，魅力

参考例句：

• The beauty of the scene filled us with enchantment.风景的秀丽令我们陶醉。
• The countryside lay as under some dread enchantment.乡村好像躺在某种可怖的魔法之下。

2 narrated   

v.故事( narrate的过去式和过去分词 )

参考例句：

• Some of the story was narrated in the film. 该电影叙述了这个故事的部分情节。 来自《简明英汉词典》
• Defoe skilfully narrated the adventures of Robinson Crusoe on his desert island. 笛福生动地叙述了鲁滨逊·克鲁索在荒岛上的冒险故事。 来自《现代汉英综合大词典》

3 slain   

杀死，宰杀，杀戮( slay的过去分词 )； (slay的过去分词)

参考例句：

• The soldiers slain in the battle were burried that night. 在那天夜晚埋葬了在战斗中牺牲了的战士。
• His boy was dead, slain by the hand of the false Amulius. 他的儿子被奸诈的阿缪利乌斯杀死了。

4 undoing   

n.毁灭的原因，祸根；破坏，毁灭

参考例句：

• That one mistake was his undoing. 他一失足即成千古恨。
• This hard attitude may have led to his undoing. 可能就是这种强硬的态度导致了他的垮台。