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He had given up attending lectures out of sheer boredom.

他已经不再去听讲座了，纯粹出于厌倦。

《柯林斯英汉双解大词典》

Out of sheer boredom I would pick up a book and read on and on.

在百无聊赖中，随手抓过一本书来，读下去。

《新英汉大辞典》

"The sheer pent-up demand ... is about to take hold, " President Charles Evans of the Federal Reserve Bank of Chicago was quoted as saying in a speech Tuesday.

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He looked like he was keeping his head up by sheer force of will, and had no energy left for shaving or other trivialities.

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But it's the little white plastic dongle that's the star of this show, through the power of sheer ubiquity, popping up in coffee shops and taxicabs everywhere.

ENGADGET