To ensure peace he and his brother Polynices agreed to rule the city of Thebes on alternate years.   But when the time came for Eteocles to relinquish his power to his brother, he refused.   And this led to the expedition of the Seven Against Thebes, in which both brothers met in battle and killed each other. 

[解說]

1.      “To ensure peace he and his brother Polynices agreed to rule the city of Thebes on alternate years”：為了確保和平，他和他弟弟 Polynices 同意各輪幾年的統治Thebes城。 “alternate”：輪流的。 “on alternate years”：以輪流幾年為條件。此 “on” = “on the basis of” (以 … 為基礎，為條件)。

2.      “But when the time came for Eteocles to relinquish his power to his brother, he refused”：可是，當 Eteocles 放棄權力給弟弟的時間到來時，他拒絕了。 “relinquish” =  give up。

3.      “And this led to the expedition of the Seven Against Thebes”：而這個導至七勇士征Thebes 的征戰。 “expedition”：征戰。 Polynices 邀集七勇士回來攻打 Thebes，史稱 the Seven Against Thebes。

4.      “in which both brothers met in battle and killed each other”：在征戰中，兩兄弟在戰爭中相遇而互相殺死對方。 

[複習填充]

To en      peace he and his brother Polynices agreed to rule the city of Thebes on  al        years.  But when the time came for Eteocles to re         his power    his brother, he refused.  And this led to the ex           of the Seven Against Thebes, in which both brothers met in b       and killed each other.

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