on the edge of seat

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释义
十分兴奋的，兴奋得坐不住的；非常紧张的；翘首以盼
In suspense; waiting eagerly or anxiously for some resolution.

例句
Margaret: She's claiming to be a prophet. The whole world is sitting on the edge of their seat. (The Newsroom)
玛格丽特：她声称自己是先知。整个世界都对她翘首以盼。（新闻编辑室）