It was the bitterest reproach he had made.

这是他的最苛刻的责备了。

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I must seek Salvation from my bitterest friend, my Dearest enemy.

我必须从最亲密的敌人（亦是刻薄的朋友）那里寻求帮助。

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So an old proverb says that the sweetest fruit is one that has undergone the bitterest ordeal.

所以有一句老话说，最甜蜜的果实一定经历了最苦涩的考验。

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"Perhaps it was the bitterest night I have had at Barcelona, " he told Spanish Canal Plus television.

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But their bitterest discord is over legislation drafted by Mr Lieberman's party to ease conversion to Judaism.

ECONOMIST: Israel's foreign minister

It wasn't his government, but his bitterest rival's, (David) Ben-Gurion and the others.

BBC: Jerusalem Diary: 20 April